RHSA-2026:87246
Vulnerability from csaf_redhat - Published: 2026-10-21 18:36 - Updated: 2026-10-23 11:17Summary
Red Hat Security Advisory: go-toolset:rhel8 security, bug fix, and enhancement update
Severity
Important
Notes
Topic: An update for the go-toolset:rhel8 module is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Go Toolset provides the Go programming language tools and libraries. Go is alternatively known as golang.
Security Fix(es):
* golang: net/http: net/http: sensitive headers incorrectly sent after cross-domain redirect (CVE-2024-45336)
* crypto/internal/nistec: golang: Timing sidechannel for P-256 on ppc64le in crypto/internal/nistec (CVE-2025-22866)
* crypto/x509: Usage of ExtKeyUsageAny disables policy validation in crypto/x509 (CVE-2025-22874)
* net/http: Sensitive headers not cleared on cross-origin redirect in net/http (CVE-2025-4673)
* crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption (CVE-2025-68121)
* crypto/x509: Incorrect enforcement of email constraints in crypto/x509 (CVE-2026-27137)
* crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281)
* crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application (CVE-2026-33810)
* golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root (CVE-2026-32282)
* crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283)
* crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)
* golang: cmd/compile: no-op interface conversion bypasses overlap checking (CVE-2026-27144)
* golang: cmd/compile: possible memory corruption after bound check elimination (CVE-2026-27143)
* net/mail: golang: net/mail: Denial of Service via pathological email address parsing (CVE-2026-42499)
* net/http/internal/http2: golang: golang.org/x/net: Go HTTP/2: Denial of Service via malformed SETTINGS_MAX_FRAME_SIZE frame (CVE-2026-33814)
* net/mail: golang: Go net/mail: Denial of Service via crafted email inputs (CVE-2026-39820)
* net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME (CVE-2026-33811)
* golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821)
* mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header (CVE-2026-42504)
* crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries (CVE-2026-27145)
* encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818)
* net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860)
* net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service (CVE-2026-56853)
* html/template: golang: Go html/template: Cross-Site Scripting via pathological input (CVE-2026-56858)
* crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862)
* encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue (CVE-2026-56859)
* golang: crypto/x509: Go: crypto/x509: mitigation for security concerns with a specific Certificate Authority (CVE-2026-111943)
Bug Fix(es) and Enhancement(s):
* go-toolset:rhel8/golang:Update Go to version 1.25.9+2 [rhel-8.6.z] (JIRA:RHEL-192032)
* go-toolset: golang: Update Go to version 1.24.6+1 [rhel-8.6.z] (JIRA:RHEL-235970)
* Rebase delve with golang 1.26.1 (JIRA:RHEL-238405)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in the net/http package of the Golang standard library. The HTTP client drops sensitive headers after following a cross-domain redirect. For example, a request to `a.com/` containing an Authorization header redirected to `b.com/` will not send that header to `b.com`. However, the sensitive headers would be restored if the client received a subsequent same-domain redirect. For example, a chain of redirects from `a.com/`, to `b.com/1`, and finally to `b.com/2` would incorrectly send the Authorization header to `b.com/2`.
5.9 (Medium)
Affected products
Fixed
26 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-8.6.0.Z.AUS:delve-0:1.26.1-1.module+el8.6.0+24782+a062e766.src::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:delve-0:1.26.1-1.module+el8.6.0+24782+a062e766.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:delve-debuginfo-0:1.26.1-1.module+el8.6.0+24782+a062e766.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:delve-debugsource-0:1.26.1-1.module+el8.6.0+24782+a062e766.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:go-toolset-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:golang-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.src::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:golang-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:golang-bin-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:golang-docs-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.noarch::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:golang-misc-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.noarch::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:golang-race-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:golang-src-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.noarch::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.AUS:golang-tests-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.noarch::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:delve-0:1.26.1-1.module+el8.6.0+24782+a062e766.src::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:delve-0:1.26.1-1.module+el8.6.0+24782+a062e766.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:delve-debuginfo-0:1.26.1-1.module+el8.6.0+24782+a062e766.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:delve-debugsource-0:1.26.1-1.module+el8.6.0+24782+a062e766.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:go-toolset-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:golang-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.src::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:golang-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:golang-bin-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:golang-docs-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.noarch::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:golang-misc-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.noarch::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:golang-race-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.x86_64::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:golang-src-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.noarch::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS.EXTENSION:golang-tests-0:1.26.10-4.module+el8.6.0+25114+90ecdb41.noarch::go-toolset:rhel8 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in net/http. Handling Proxy-Authorization and Proxy-Authenticate headers during cross-origin redirects allows these headers to be inadvertently forwarded, potentially exposing sensitive authentication credentials. This flaw allows a network-based attacker to manipulate redirect responses, unintentionally exposing authentication details to unauthorized parties.
6.8 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the Golang crypto/internal/nistec package. Due to the usage of a variable time instruction in the assembly implementation of an internal function, a small number of bits of secret scalars are leaked on the ppc64le architecture. Considering how this function is used, this leakage is likely insufficient to recover the private key when P-256 is used in any well-known protocols.
5.3 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in Go's crypto/x509 package. This vulnerability allows improper certificate validation, bypassing policy constraints via using ExtKeyUsageAny in VerifyOptions.KeyUsages.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the crypto/tls component. This vulnerability occurs during Transport Layer Security (TLS) session resumption when certificate authority (CA) settings are modified between the initial and resumed handshakes. An attacker could exploit this to bypass certificate validation, allowing a client or server to establish a connection that should have been rejected. This could lead to an authentication bypass under specific conditions.
7.4 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A certificate validation flaw has been discovered in the golang crypto/x509 module. When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the cmd/compile package in the Go standard library. The compiler fails to correctly check for integer overflow or underflow in arithmetic operations involving loop induction variables. As a result, the compiler allows invalid memory indexing to occur at runtime, potentially leading to memory corruption.
8.1 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the cmd/compile package in the Go standard library. A no-op interface conversion prevented the compiler from correctly identifying non-overlapping memory moves. As a result, the compiler allows unsafe memory move operations to occur at runtime, potentially causing data corruption, memory corruption or unexpected application behavior.
8.1 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the `crypto/x509` package of `golang`. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name (SAN) entries. The certificate verification process, specifically the `VerifyHostname` function, incurs excessive computational overhead due to repeated string operations when processing these entries. This can lead to a significant performance degradation or unresponsiveness of systems validating such certificates.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the Go standard library packages `crypto/x509` and `crypto/tls`. During the process of building a certificate chain, an attacker can provide a large number of intermediate certificates. This excessive input is not properly limited, leading to an uncontrolled amount of work being performed. This can result in a denial of service (DoS) condition, making the affected system or application unavailable to legitimate users.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in Go's `crypto/x509` package. A remote attacker could exploit this by presenting a specially crafted certificate chain containing a large number of policy mappings. This inefficient validation process consumes excessive resources, which can lead to a denial of service (DoS) for applications or systems performing certificate validation.
5.9 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the internal/syscall/unix package in the Go standard library. If the target of the `Root.Chmod` function is replaced with a symbolic link during execution, specifically after `Root.Chmod` checks the target but before acting, the `chmod` operation will be performed on the file the symbolic link points to. This issue can bypass directory restrictions and lead to unauthorized permission changes on the filesystem.
7.8 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the `crypto/tls` package within the Go (golang) standard library, specifically affecting TLS 1.3 connections. A remote attacker can exploit this vulnerability by sending multiple key update messages in a single record after the handshake. This can cause the connection to deadlock, leading to uncontrolled consumption of resources and ultimately a denial of service (DoS).
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the `crypto/x509` package within Go (golang). When verifying a certificate chain, excluded DNS (Domain Name System) constraints are not correctly applied to wildcard DNS Subject Alternative Names (SANs) if the case of the SAN differs from the constraint. This oversight could allow an attacker to bypass certificate validation, potentially leading to the acceptance of a malicious certificate that should have been rejected. This issue specifically impacts the validation of trusted certificate chains.
8.8 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the `net` package of Go (golang), specifically when using the `LookupCNAME` function with the `cgo` DNS resolver. A remote attacker could exploit this by providing a very long Canonical Name (CNAME) response. This can trigger a double-free of C memory, leading to a crash and a Denial of Service (DoS) for the affected application.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the HTTP/2 protocol implementation within the Go standard library (golang.org/x/net and net/http/internal/http2). A remote attacker can exploit this vulnerability by sending a specially crafted HTTP/2 SETTINGS frame with the SETTINGS_MAX_FRAME_SIZE parameter set to zero. This malicious frame causes the transport layer to enter an infinite loop of writing CONTINUATION frames, leading to resource exhaustion and a Denial of Service (DoS) condition.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the `encoding/asn1` package in Go. An attacker could provide a specially crafted, deeply-nested Abstract Syntax Notation One (ASN.1) structure, leading to excessive recursion during the `Unmarshal` operation. This could result in stack exhaustion and a Denial of Service (DoS) condition.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the `net/mail` package of the Go programming language. An attacker could provide specially crafted inputs to the `ParseAddress`, `ParseAddressList`, or `ParseDate` functions. This could lead to excessive consumption of CPU and memory resources, resulting in a Denial of Service (DoS) for applications processing these inputs.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname (for example, xn--example-.com returns example.com instead of an error). Applications that validate the ASCII form then convert to Unicode may grant access to a restricted hostname the ASCII check would have rejected.
8.2 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the `net/mail` package within the Go standard library. A remote attacker could provide specially crafted, pathological email addresses. When these malformed email addresses are parsed by the `consumePhrase` function, it can lead to excessive resource consumption due to quadratic string concatenation, resulting in a Denial of Service (DoS) condition.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the Golang MIME (Multipurpose Internet Mail Extensions) package. A remote attacker could exploit this vulnerability by sending a maliciously-crafted MIME header containing many invalid encoded-words. This could lead to excessive CPU consumption, resulting in a Denial of Service (DoS) for the affected system.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the `net/http` component of the Go standard library. When a server is configured to support unencrypted HTTP/2, it reads initial bytes from new connections to detect the HTTP/2 client preface. However, the `ReadHeaderTimeout` is not correctly applied during this process. This oversight could allow a remote attacker to maintain open connections indefinitely, potentially leading to a Denial of Service (DoS) by exhausting server resources.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the `html/template` component of Go (golang). Pathological inputs could prematurely close an unescaped forward slash ('/'), allowing an attacker to inject arbitrary content. This could lead to Cross-Site Scripting (XSS), where malicious scripts are executed in a user's browser, potentially compromising user data or actions.
8.1 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the `encoding/xml` package of Go. The `DecodeElement` function failed to correctly track recursion depth, which could lead to stack exhaustion. A remote attacker could exploit this vulnerability by providing a specially crafted XML input, resulting in a Denial of Service (DoS) for the affected application.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in `net/url`, a component of `golang`. This vulnerability arises when resolving relative paths that contain numerous parent directory ('..') segments. A remote attacker could exploit this by providing a specially crafted path, leading to quadratic time complexity and excessive memory allocation. This can result in a Denial of Service (DoS) due to resource exhaustion.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the `crypto/tls` package, part of `golang`. A malicious client can exploit this vulnerability by continuously sending KeyUpdate messages to a server. This forces the server to perform indefinite key derivation operations, leading to resource exhaustion and a Denial of Service (DoS) condition.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in Go's net/http package. When an HTTP CONNECT request with a request body is rejected by a server, the client transport can desynchronize the connection before returning it to the shared idle pool. In shared reverse proxy environments, a remote attacker can exploit this issue to cause cross-user response poisoning, potentially exposing sensitive information or serving unintended content to other users.
6.5 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the Go net/http package. A remote attacker can trigger a Denial of Service (DoS) by sending HTTP/2 requests that declare an excessive number of trailer header fields. Because the server bypasses configured header limits when allocating memory for these declarations, an attacker can exhaust system memory resources and cause the application to crash.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in Go's net/http package. When operating as a reverse proxy, the HTTP/2 implementation does not properly validate framing-related headers in responses received from upstream servers before forwarding them to downstream HTTP/1 clients. A malicious upstream server can exploit this flaw by sending malformed response headers, resulting in HTTP response smuggling, where message boundaries between the proxy and client become desynchronized. This issue may allow attackers to bypass security controls, poison web caches, or intercept sensitive data from other user sessions.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in Go's HTTP/2 server implementation. A remote attacker can bypass connection-level flow control limits—mechanisms that regulate incoming network data—potentially causing excessive memory consumption and a Denial of Service (DoS). This issue occurs because the server improperly refunds flow control credits twice for the same data: once when a client resets a stream, and again when the application reads the buffered data. Consequently, a malicious client can exceed configured connection buffer limits.
5.3 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the Go net/http package. A remote attacker can cause a Denial of Service (DoS) by sending an HTTP request containing a Range header with a large number of small byte ranges. When the server processes these ranges while serving content, it consumes an excessive amount of CPU resources, rendering the application unresponsive to legitimate users.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in the Go net/http package. This flaw allows a remote attacker to cause a Denial of Service (DoS) by triggering excessive CPU consumption on an affected client or server. By opening a large number of HTTP/2 streams and repeatedly sending small configuration (SETTINGS) frames that modify window sizes, an attacker forces the system into intensive state processing. This resource exhaustion degrades performance and can render the service unresponsive.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in Go's net/http package. When an HTTP server sends a successful response to an HTTP/1 CONNECT request without taking raw control of the connection, it improperly continues to process incoming data as standard HTTP requests instead of establishing a tunnel. A remote attacker can exploit this behavior to conduct HTTP request smuggling through intermediate proxy servers, potentially bypassing security controls.
6.5 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the mime/multipart and net/textproto packages in Go. A remote attacker could exploit this vulnerability by submitting a crafted multipart form request that bypasses configured memory limits when the remaining boundary limit is small. This issue allows the application to read an arbitrarily long line into memory, leading to excessive resource consumption and a Denial of Service (DoS).
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the Go toolchain (cmd/go). When a user works inside a malicious Go project that defines a bogus golang.org/fips140 module and connects to an untrusted Go module proxy (GOMODPROXY), the proxy can serve an arbitrary replacement module that still passes local verification. This can lead to arbitrary code execution during Go build or module download operations.
6.7 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the Go toolchain (cmd/go). When a user works inside a malicious Go project that forges a golang.org/toolchain go.sum entry and uses an untrusted Go module proxy, cmd/go can skip the canonical checksum database check for toolchain downloads. A tampered toolchain may then be downloaded and executed.
6.7 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in the html/template package in Go. This vulnerability allows a remote attacker to conduct cross-site scripting (XSS, an attack that executes malicious scripts in a user's browser) through improper output escaping. When a JavaScript template literal contains consecutive expressions, the parser fails to properly reset its context tracking state. Consequently, subsequent regular expression literals are not accurately recognized and escaped, potentially allowing untrusted content to bypass template sanitization.
6.1 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in Go's html/template component. This vulnerability allows cross-site scripting (XSS) due to improper escaping of the 'yield' keyword during template processing. A remote attacker could exploit this flaw by providing crafted input to an affected template, leading to arbitrary script execution in a user's web browser.
6.1 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in crypto/tls. A remote attacker can trigger this vulnerability by sending a specially crafted packet containing multiple Encrypted Client Hello (ECH) outer extension references to a server. Processing these unauthorized references leads to excessive memory consumption, causing a Denial of Service (DoS) through server crashes or unresponsiveness.
7.5 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
A flaw was found in Go's net/http package. A remote attacker can cause a Denial of Service (DoS) by crashing the HTTP/2 server. Due to missing synchronization, the server concurrently modifies its HPACK (HTTP/2 header compression) encoder when encoding response headers while processing incoming table size configuration updates. A malicious client can exploit this race condition by repeatedly sending requests while altering the header table size, ultimately causing the server process to crash.
5.9 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Moderate
A flaw was found in Go's crypto/x509 package. The certificate verification process fails to block trust in intermediate certificates associated with a compromised Certificate Authority (CA). A remote attacker presenting a certificate signed by these intermediate authorities can impersonate legitimate servers during secure connections. This flaw can enable an attacker to conduct a man-in-the-middle (MitM) attack to intercept or alter confidential communications.
6.8 (Medium)
Affected products
Fixed
26 products, the same list as for
CVE-2024-45336
Threats
Impact
Important
References
336 references
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"text": "An update for the go-toolset:rhel8 module is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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"text": "Go Toolset provides the Go programming language tools and libraries. Go is alternatively known as golang. \n\nSecurity Fix(es):\n\n* golang: net/http: net/http: sensitive headers incorrectly sent after cross-domain redirect (CVE-2024-45336)\n\n* crypto/internal/nistec: golang: Timing sidechannel for P-256 on ppc64le in crypto/internal/nistec (CVE-2025-22866)\n\n* crypto/x509: Usage of ExtKeyUsageAny disables policy validation in crypto/x509 (CVE-2025-22874)\n\n* net/http: Sensitive headers not cleared on cross-origin redirect in net/http (CVE-2025-4673)\n\n* crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption (CVE-2025-68121)\n\n* crypto/x509: Incorrect enforcement of email constraints in crypto/x509 (CVE-2026-27137)\n\n* crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281)\n\n* crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application (CVE-2026-33810)\n\n* golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root (CVE-2026-32282)\n\n* crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283)\n\n* crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)\n\n* golang: cmd/compile: no-op interface conversion bypasses overlap checking (CVE-2026-27144)\n\n* golang: cmd/compile: possible memory corruption after bound check elimination (CVE-2026-27143)\n\n* net/mail: golang: net/mail: Denial of Service via pathological email address parsing (CVE-2026-42499)\n\n* net/http/internal/http2: golang: golang.org/x/net: Go HTTP/2: Denial of Service via malformed SETTINGS_MAX_FRAME_SIZE frame (CVE-2026-33814)\n\n* net/mail: golang: Go net/mail: Denial of Service via crafted email inputs (CVE-2026-39820)\n\n* net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME (CVE-2026-33811)\n\n* golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821)\n\n* mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header (CVE-2026-42504)\n\n* crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries (CVE-2026-27145)\n\n* encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818)\n\n* net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860)\n\n* net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service (CVE-2026-56853)\n\n* html/template: golang: Go html/template: Cross-Site Scripting via pathological input (CVE-2026-56858)\n\n* crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862)\n\n* encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue (CVE-2026-56859)\n\n* golang: crypto/x509: Go: crypto/x509: mitigation for security concerns with a specific Certificate Authority (CVE-2026-111943)\n\nBug Fix(es) and Enhancement(s):\n\n* go-toolset:rhel8/golang:Update Go to version 1.25.9+2 [rhel-8.6.z] (JIRA:RHEL-192032)\n\n* go-toolset: golang: Update Go to version 1.24.6+1 [rhel-8.6.z] (JIRA:RHEL-235970)\n\n* Rebase delve with golang 1.26.1 (JIRA:RHEL-238405)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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"cve": "CVE-2024-45336",
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"id": "CWE-200",
"name": "Exposure of Sensitive Information to an Unauthorized Actor"
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"discovery_date": "2025-01-23T12:57:38.123000+00:00",
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"text": "2341751"
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{
"category": "description",
"text": "A flaw was found in the net/http package of the Golang standard library. The HTTP client drops sensitive headers after following a cross-domain redirect. For example, a request to `a.com/` containing an Authorization header redirected to `b.com/` will not send that header to `b.com`. However, the sensitive headers would be restored if the client received a subsequent same-domain redirect. For example, a chain of redirects from `a.com/`, to `b.com/1`, and finally to `b.com/2` would incorrectly send the Authorization header to `b.com/2`.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "golang: net/http: net/http: sensitive headers incorrectly sent after cross-domain redirect",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Moderate impact: Red Hat products that include the affected golang net/http client are affected by a credential-disclosure flaw in HTTP redirect handling. When a client request with a sensitive header such as Authorization is redirected from one domain to another and then to a same-domain URL, the client can incorrectly restore and send that header to the final destination, potentially exposing credentials and other sensitive information. The current Red Hat scope contains affected entries across Red Hat Enterprise Linux, OpenShift Container Platform, and other Red Hat products and components; some affect records have a current NOTAFFECTED resolution, indicating those specific product/version records are not affected, but the record provides no technical justification for why. For affected entries marked DELEGATED, a fix is being pursued by the responsible product teams. For entries marked DEFER, the record does not establish a product-specific reason for deferral; the residual risk is that applications using the affected net/http client can still disclose sensitive headers through this redirect sequence. Red Hat\u0027s CVSS is 5.9 Moderate (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N), compared with CISA\u0027s 6.1 Moderate, reflecting Red Hat\u0027s higher attack-complexity and unchanged-scope assessment and confidentiality-only impact.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2024-45336"
},
{
"category": "external",
"summary": "RHBZ#2341751",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2341751"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2024-45336",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-45336"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-45336",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45336"
},
{
"category": "external",
"summary": "https://github.com/golang/go/issues/70530",
"url": "https://github.com/golang/go/issues/70530"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/sSaUhLA-2SI",
"url": "https://groups.google.com/g/golang-announce/c/sSaUhLA-2SI"
}
],
"release_date": "2025-01-17T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "golang: net/http: net/http: sensitive headers incorrectly sent after cross-domain redirect"
},
{
"cve": "CVE-2025-4673",
"cwe": {
"id": "CWE-201",
"name": "Insertion of Sensitive Information Into Sent Data"
},
"discovery_date": "2025-06-18T06:34:57.662025+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2373305"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in net/http. Handling Proxy-Authorization and Proxy-Authenticate headers during cross-origin redirects allows these headers to be inadvertently forwarded, potentially exposing sensitive authentication credentials. This flaw allows a network-based attacker to manipulate redirect responses, unintentionally exposing authentication details to unauthorized parties.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/http: Sensitive headers not cleared on cross-origin redirect in net/http",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The issue is rated as Moderate because while it can lead to a significant compromise of confidentiality, the attack complexity is high. Successful exploitation requires a specific set of circumstances, including the use of a proxy that relies on these headers for authentication and a user being enticed to interact with a malicious URL. The vulnerability does not allow for arbitrary code execution or a direct compromise of system integrity or availability.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-4673"
},
{
"category": "external",
"summary": "RHBZ#2373305",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373305"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-4673",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-4673"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-4673",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-4673"
},
{
"category": "external",
"summary": "https://go.dev/cl/679257",
"url": "https://go.dev/cl/679257"
},
{
"category": "external",
"summary": "https://go.dev/issue/73816",
"url": "https://go.dev/issue/73816"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/ufZ8WpEsA3A",
"url": "https://groups.google.com/g/golang-announce/c/ufZ8WpEsA3A"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2025-3751",
"url": "https://pkg.go.dev/vuln/GO-2025-3751"
}
],
"release_date": "2025-06-11T16:42:53.054000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"url": "https://access.redhat.com/errata/RHSA-2026:87246"
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N",
"version": "3.1"
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "net/http: Sensitive headers not cleared on cross-origin redirect in net/http"
},
{
"cve": "CVE-2025-22866",
"cwe": {
"id": "CWE-200",
"name": "Exposure of Sensitive Information to an Unauthorized Actor"
},
"discovery_date": "2025-02-06T17:00:56.155646+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2344219"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Golang crypto/internal/nistec package. Due to the usage of a variable time instruction in the assembly implementation of an internal function, a small number of bits of secret scalars are leaked on the ppc64le architecture. Considering how this function is used, this leakage is likely insufficient to recover the private key when P-256 is used in any well-known protocols.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/internal/nistec: golang: Timing sidechannel for P-256 on ppc64le in crypto/internal/nistec",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Moderate impact: Red Hat product builds using the Golang crypto/internal/nistec component on ppc64le are exposed to a timing side channel. A variable-time instruction in an internal assembly function leaks a small number of bits of secret scalars; given how the function is used, the leakage is likely insufficient to recover a private key when P-256 is used in well-known protocols. The current affects cover Red Hat Enterprise Linux, OpenShift Container Platform, and other Red Hat products, while entries resolved as Not a Bug, Obsolete, or delegated NOTAFFECTED are outside the actionable affected scope. For the DEFER entries, remediation is deferred because the leakage is not believed sufficient for private-key recovery in those protocols; the residual risk is limited scalar-bit leakage on ppc64le. For DELEGATED entries, the same Moderate impact is being handled by the relevant product teams, with a fix being pursued. Red Hat\u0027s CVSS is 5.3 Moderate with a network attack vector, compared with CISA\u0027s 4.0 Moderate local-vector assessment.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-22866"
},
{
"category": "external",
"summary": "RHBZ#2344219",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2344219"
},
{
"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2025-22866"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-22866",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22866"
},
{
"category": "external",
"summary": "https://go.dev/cl/643735",
"url": "https://go.dev/cl/643735"
},
{
"category": "external",
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"url": "https://go.dev/issue/71383"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/xU1ZCHUZw3k",
"url": "https://groups.google.com/g/golang-announce/c/xU1ZCHUZw3k"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2025-3447",
"url": "https://pkg.go.dev/vuln/GO-2025-3447"
}
],
"release_date": "2025-02-06T16:54:10.252000+00:00",
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "crypto/internal/nistec: golang: Timing sidechannel for P-256 on ppc64le in crypto/internal/nistec"
},
{
"cve": "CVE-2025-22874",
"cwe": {
"id": "CWE-295",
"name": "Improper Certificate Validation"
},
"discovery_date": "2025-06-11T17:00:48.521459+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2372320"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Go\u0027s crypto/x509 package. This vulnerability allows improper certificate validation, bypassing policy constraints via using ExtKeyUsageAny in VerifyOptions.KeyUsages.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/x509: Usage of ExtKeyUsageAny disables policy validation in crypto/x509",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This flaw is rated as an Important severity because the vulnerability was found in the certificate validation logic of the Verify function. When VerifyOptions.KeyUsages includes ExtKeyUsageAny, certificate chains containing policy graphs may bypass certificate policy validation. This flaw allows an attacker to trick the system into accepting an invalid certificate, potentially enabling spoofing attacks, the issue weakens trust decisions in affected cases and impacts system integrity. Confidentiality and availability are not affected.\n\nRed Hat Openshift Container Platform openshift-golang-builder-container ships golang 1.23 and does not ship the affected code.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-22874"
},
{
"category": "external",
"summary": "RHBZ#2372320",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2372320"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-22874",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-22874"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-22874",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22874"
},
{
"category": "external",
"summary": "https://go.dev/cl/670375",
"url": "https://go.dev/cl/670375"
},
{
"category": "external",
"summary": "https://go.dev/issue/73612",
"url": "https://go.dev/issue/73612"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/ufZ8WpEsA3A",
"url": "https://groups.google.com/g/golang-announce/c/ufZ8WpEsA3A"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2025-3749",
"url": "https://pkg.go.dev/vuln/GO-2025-3749"
}
],
"release_date": "2025-06-11T16:42:52.856000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "crypto/x509: Usage of ExtKeyUsageAny disables policy validation in crypto/x509"
},
{
"cve": "CVE-2025-68121",
"cwe": {
"id": "CWE-295",
"name": "Improper Certificate Validation"
},
"discovery_date": "2026-02-05T18:01:30.086058+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2437111"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the crypto/tls component. This vulnerability occurs during Transport Layer Security (TLS) session resumption when certificate authority (CA) settings are modified between the initial and resumed handshakes. An attacker could exploit this to bypass certificate validation, allowing a client or server to establish a connection that should have been rejected. This could lead to an authentication bypass under specific conditions.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is a moderate flaw because it only occurs under specific conditions, such as TLS session resumption with runtime changes to certificate authority settings. Exploitation is not straightforward and requires a controlled setup. The impact is limited to certificate validation within the same component and does not affect system availability.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-68121"
},
{
"category": "external",
"summary": "RHBZ#2437111",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2437111"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-68121",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-68121"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-68121",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68121"
},
{
"category": "external",
"summary": "https://go.dev/cl/737700",
"url": "https://go.dev/cl/737700"
},
{
"category": "external",
"summary": "https://go.dev/issue/77217",
"url": "https://go.dev/issue/77217"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/K09ubi9FQFk",
"url": "https://groups.google.com/g/golang-announce/c/K09ubi9FQFk"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4337",
"url": "https://pkg.go.dev/vuln/GO-2026-4337"
}
],
"release_date": "2026-02-05T17:48:44.141000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption"
},
{
"cve": "CVE-2026-27137",
"cwe": {
"id": "CWE-295",
"name": "Improper Certificate Validation"
},
"discovery_date": "2026-03-06T22:01:38.859733+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2445345"
}
],
"notes": [
{
"category": "description",
"text": "A certificate validation flaw has been discovered in the golang crypto/x509 module. When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/x509: Incorrect enforcement of email constraints in crypto/x509",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-27137"
},
{
"category": "external",
"summary": "RHBZ#2445345",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2445345"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-27137",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-27137"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-27137",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27137"
},
{
"category": "external",
"summary": "https://go.dev/cl/752182",
"url": "https://go.dev/cl/752182"
},
{
"category": "external",
"summary": "https://go.dev/issue/77952",
"url": "https://go.dev/issue/77952"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk",
"url": "https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4599",
"url": "https://pkg.go.dev/vuln/GO-2026-4599"
}
],
"release_date": "2026-03-06T21:28:13.748000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "crypto/x509: Incorrect enforcement of email constraints in crypto/x509"
},
{
"cve": "CVE-2026-27143",
"cwe": {
"id": "CWE-733",
"name": "Compiler Optimization Removal or Modification of Security-critical Code"
},
"discovery_date": "2026-04-08T02:01:29.491546+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2456342"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the cmd/compile package in the Go standard library. The compiler fails to correctly check for integer overflow or underflow in arithmetic operations involving loop induction variables. As a result, the compiler allows invalid memory indexing to occur at runtime, potentially leading to memory corruption.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "golang: cmd/compile: possible memory corruption after bound check elimination",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is only exploitable in applications that contain a loop structure that relies on an induction variable. An induction variable is a variable that gets modified, usually incremented or decremented, by a predictable amount on each iteration. Inside the loop, the induction variable must be directly used as the index to access or modify elements within an array or a slice. Additionally, an attacker must be able to cause an integer overflow or underflow in the induction variable to trigger this issue. Due to these reasons, this flaw has been rated with a moderate severity.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-27143"
},
{
"category": "external",
"summary": "RHBZ#2456342",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456342"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-27143",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-27143"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-27143",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27143"
},
{
"category": "external",
"summary": "https://go.dev/cl/763765",
"url": "https://go.dev/cl/763765"
},
{
"category": "external",
"summary": "https://go.dev/issue/78333",
"url": "https://go.dev/issue/78333"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
"url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4868",
"url": "https://pkg.go.dev/vuln/GO-2026-4868"
}
],
"release_date": "2026-04-08T01:06:57.168000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"availabilityImpact": "HIGH",
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"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "golang: cmd/compile: possible memory corruption after bound check elimination"
},
{
"cve": "CVE-2026-27144",
"cwe": {
"id": "CWE-440",
"name": "Expected Behavior Violation"
},
"discovery_date": "2026-04-08T02:01:22.896153+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2456340"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the cmd/compile package in the Go standard library. A no-op interface conversion prevented the compiler from correctly identifying non-overlapping memory moves. As a result, the compiler allows unsafe memory move operations to occur at runtime, potentially causing data corruption, memory corruption or unexpected application behavior.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "golang: cmd/compile: no-op interface conversion bypasses overlap checking",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue is only exploitable in applications that contain a memory move or copy operation that is subject to a no-op (no-operation) interface conversion. Furthermore, the source and destination memory addresses involved in the move or copy must overlap and an attacker must be able to supply an input that triggers this specific operation. Due to these reasons, this flaw has been rated with a moderate severity.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-27144"
},
{
"category": "external",
"summary": "RHBZ#2456340",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456340"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-27144",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-27144"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-27144",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27144"
},
{
"category": "external",
"summary": "https://go.dev/cl/763764",
"url": "https://go.dev/cl/763764"
},
{
"category": "external",
"summary": "https://go.dev/issue/78371",
"url": "https://go.dev/issue/78371"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
"url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4867",
"url": "https://pkg.go.dev/vuln/GO-2026-4867"
}
],
"release_date": "2026-04-08T01:06:56.908000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:87246"
},
{
"category": "workaround",
"details": "To mitigate this issue, review code that performs memory copies or struct assignments. If data is being passed through an interface (such as \u0027any\u0027 or \u0027interface{}\u0027) just before a move operation, refactor the code to use concrete types or explicit pointers instead.",
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{
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "golang: cmd/compile: no-op interface conversion bypasses overlap checking"
},
{
"cve": "CVE-2026-27145",
"cwe": {
"id": "CWE-606",
"name": "Unchecked Input for Loop Condition"
},
"discovery_date": "2026-06-02T23:01:08.992540+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2484207"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the `crypto/x509` package of `golang`. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name (SAN) entries. The certificate verification process, specifically the `VerifyHostname` function, incurs excessive computational overhead due to repeated string operations when processing these entries. This can lead to a significant performance degradation or unresponsiveness of systems validating such certificates.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A flaw was found in the Go standard library crypto/x509 package. When verifying a TLS certificate hostname, VerifyHostname processed each DNS Subject Alternative Name (SAN) entry in a loop and repeatedly split the candidate hostname on \".\" characters. For certificates with a very large DNS SAN list, CPU use could grow quadratically with the number of SAN entries and hostname labels. Because hostname verification runs before the certificate chain is built, this overhead can occur even when the certificate is not trusted.\n\nRed Hat rates this issue as Important. It affects Red Hat products that include the Go standard library crypto/x509 code from an affected Go toolchain version (before Go 1.25.11, or from Go 1.26.0 through Go 1.26.3). Applications and container images built with a fixed Go release (1.25.11 or later, or 1.26.4 or later) are not affected. Community distributions such as Fedora are also affected.\n\nUpstream fix: Go 1.25.11 and Go 1.26.4 (GO-2026-5037).",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-27145"
},
{
"category": "external",
"summary": "RHBZ#2484207",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484207"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-27145",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-27145"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-27145",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27145"
},
{
"category": "external",
"summary": "https://go.dev/cl/783621",
"url": "https://go.dev/cl/783621"
},
{
"category": "external",
"summary": "https://go.dev/issue/79694",
"url": "https://go.dev/issue/79694"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw",
"url": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-5037",
"url": "https://pkg.go.dev/vuln/GO-2026-5037"
}
],
"release_date": "2026-06-02T22:01:36.954000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:87246"
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{
"category": "workaround",
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{
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries"
},
{
"cve": "CVE-2026-32280",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-04-08T02:01:19.572351+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2456339"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Go standard library packages `crypto/x509` and `crypto/tls`. During the process of building a certificate chain, an attacker can provide a large number of intermediate certificates. This excessive input is not properly limited, leading to an uncontrolled amount of work being performed. This can result in a denial of service (DoS) condition, making the affected system or application unavailable to legitimate users.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service vulnerability in the Go standard library\u0027s certificate chain building process. Systems utilizing Go applications that process untrusted TLS certificates or X.509 certificate chains are susceptible to resource exhaustion when presented with an excessive number of intermediate certificates, potentially leading to service unavailability. This flaw impacts applications directly using `crypto/x509` or `crypto/tls`.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-32280"
},
{
"category": "external",
"summary": "RHBZ#2456339",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456339"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-32280",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-32280"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-32280",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32280"
},
{
"category": "external",
"summary": "https://go.dev/cl/758320",
"url": "https://go.dev/cl/758320"
},
{
"category": "external",
"summary": "https://go.dev/issue/78282",
"url": "https://go.dev/issue/78282"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
"url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4947",
"url": "https://pkg.go.dev/vuln/GO-2026-4947"
}
],
"release_date": "2026-04-08T01:06:58.595000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"attackVector": "NETWORK",
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"title": "crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building"
},
{
"cve": "CVE-2026-32281",
"cwe": {
"id": "CWE-1050",
"name": "Excessive Platform Resource Consumption within a Loop"
},
"discovery_date": "2026-04-08T02:01:00.930989+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2456333"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Go\u0027s `crypto/x509` package. A remote attacker could exploit this by presenting a specially crafted certificate chain containing a large number of policy mappings. This inefficient validation process consumes excessive resources, which can lead to a denial of service (DoS) for applications or systems performing certificate validation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This flaw occurs during the validation of otherwise trusted certificate chains that contain a large number of policy mappings, leading to excessive resource consumption. Exploitation requires an attacker to present a specially crafted, yet trusted, certificate chain which would require the attacker has already compromised a trusted certificate root. Red Hat continuously monitors certificate authorities and curates the set which is trusted by default for Red Hat products.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-32281"
},
{
"category": "external",
"summary": "RHBZ#2456333",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456333"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-32281",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-32281"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-32281",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32281"
},
{
"category": "external",
"summary": "https://go.dev/cl/758061",
"url": "https://go.dev/cl/758061"
},
{
"category": "external",
"summary": "https://go.dev/issue/78281",
"url": "https://go.dev/issue/78281"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
"url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4946",
"url": "https://pkg.go.dev/vuln/GO-2026-4946"
}
],
"release_date": "2026-04-08T01:06:58.354000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation"
},
{
"cve": "CVE-2026-32282",
"cwe": {
"id": "CWE-367",
"name": "Time-of-check Time-of-use (TOCTOU) Race Condition"
},
"discovery_date": "2026-04-08T02:01:12.683211+00:00",
"ids": [
{
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"text": "2456336"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the internal/syscall/unix package in the Go standard library. If the target of the `Root.Chmod` function is replaced with a symbolic link during execution, specifically after `Root.Chmod` checks the target but before acting, the `chmod` operation will be performed on the file the symbolic link points to. This issue can bypass directory restrictions and lead to unauthorized permission changes on the filesystem.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "To exploit this issue, an attacker needs access to the system and the required permissions to create a symbolic link. Additionally, the attacker must swap the target file with a symbolic link in the exact window after the `Root.Chmod` function checks its target but before acting. Due to these conditions, this flaw has been rated with a moderate severity.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-32282"
},
{
"category": "external",
"summary": "RHBZ#2456336",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456336"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-32282",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-32282"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-32282",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32282"
},
{
"category": "external",
"summary": "https://go.dev/cl/763761",
"url": "https://go.dev/cl/763761"
},
{
"category": "external",
"summary": "https://go.dev/issue/78293",
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{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
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},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4864",
"url": "https://pkg.go.dev/vuln/GO-2026-4864"
}
],
"release_date": "2026-04-08T01:06:55.953000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
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"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root"
},
{
"cve": "CVE-2026-32283",
"cwe": {
"id": "CWE-764",
"name": "Multiple Locks of a Critical Resource"
},
"discovery_date": "2026-04-08T02:01:16.213799+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2456338"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the `crypto/tls` package within the Go (golang) standard library, specifically affecting TLS 1.3 connections. A remote attacker can exploit this vulnerability by sending multiple key update messages in a single record after the handshake. This can cause the connection to deadlock, leading to uncontrolled consumption of resources and ultimately a denial of service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Important: A flaw in the Go `crypto/tls` package allows a remote attacker to cause a denial of service in applications using TLS 1.3. By sending multiple key update messages in a single record post-handshake, an attacker can trigger a connection deadlock, leading to uncontrolled resource consumption. This impacts Red Hat products utilizing the affected Go standard library for TLS 1.3 connections.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-32283"
},
{
"category": "external",
"summary": "RHBZ#2456338",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456338"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-32283",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-32283"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-32283",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32283"
},
{
"category": "external",
"summary": "https://go.dev/cl/763767",
"url": "https://go.dev/cl/763767"
},
{
"category": "external",
"summary": "https://go.dev/issue/78334",
"url": "https://go.dev/issue/78334"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
"url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4870",
"url": "https://pkg.go.dev/vuln/GO-2026-4870"
}
],
"release_date": "2026-04-08T01:06:57.670000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages"
},
{
"cve": "CVE-2026-33810",
"cwe": {
"id": "CWE-1289",
"name": "Improper Validation of Unsafe Equivalence in Input"
},
"discovery_date": "2026-04-08T02:01:09.100830+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2456335"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the `crypto/x509` package within Go (golang). When verifying a certificate chain, excluded DNS (Domain Name System) constraints are not correctly applied to wildcard DNS Subject Alternative Names (SANs) if the case of the SAN differs from the constraint. This oversight could allow an attacker to bypass certificate validation, potentially leading to the acceptance of a malicious certificate that should have been rejected. This issue specifically impacts the validation of trusted certificate chains.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important flaw in the Go `crypto/x509` package that could allow an attacker to bypass certificate validation. The vulnerability arises from an incorrect application of excluded DNS constraints to wildcard DNS Subject Alternative Names (SANs) when their case differs from the constraint. This could lead to Red Hat products accepting malicious certificates from otherwise trusted chains, compromising the trust model.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"scope": "CHANGED",
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"title": "crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application"
},
{
"cve": "CVE-2026-33811",
"cwe": {
"id": "CWE-1341",
"name": "Multiple Releases of Same Resource or Handle"
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"discovery_date": "2026-05-07T20:01:34.913869+00:00",
"ids": [
{
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"text": "2467822"
}
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"notes": [
{
"category": "description",
"text": "A flaw was found in the `net` package of Go (golang), specifically when using the `LookupCNAME` function with the `cgo` DNS resolver. A remote attacker could exploit this by providing a very long Canonical Name (CNAME) response. This can trigger a double-free of C memory, leading to a crash and a Denial of Service (DoS) for the affected application.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service vulnerability in the Go `net` package, affecting applications configured to use the `cgo` DNS resolver. A remote attacker could trigger a double-free memory error by providing a very long CNAME response, leading to a crash of the vulnerable application and impacting service availability.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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{
"category": "impact",
"details": "Important"
}
],
"title": "net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME"
},
{
"cve": "CVE-2026-33814",
"cwe": {
"id": "CWE-606",
"name": "Unchecked Input for Loop Condition"
},
"discovery_date": "2026-05-07T20:01:11.324941+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2467815"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the HTTP/2 protocol implementation within the Go standard library (golang.org/x/net and net/http/internal/http2). A remote attacker can exploit this vulnerability by sending a specially crafted HTTP/2 SETTINGS frame with the SETTINGS_MAX_FRAME_SIZE parameter set to zero. This malicious frame causes the transport layer to enter an infinite loop of writing CONTINUATION frames, leading to resource exhaustion and a Denial of Service (DoS) condition.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/http/internal/http2: golang: golang.org/x/net: Go HTTP/2: Denial of Service via malformed SETTINGS_MAX_FRAME_SIZE frame",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Important denial of service flaw in the Go HTTP/2 protocol implementation allows a remote, unauthenticated attacker to exhaust system resources. By sending a specially crafted HTTP/2 SETTINGS frame with a zero-value SETTINGS_MAX_FRAME_SIZE, the vulnerable Go library enters an infinite loop, impacting the availability of services utilizing HTTP/2.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
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"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-33814"
},
{
"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-33814"
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{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33814"
},
{
"category": "external",
"summary": "https://go.dev/cl/761581",
"url": "https://go.dev/cl/761581"
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"category": "external",
"summary": "https://go.dev/cl/761640",
"url": "https://go.dev/cl/761640"
},
{
"category": "external",
"summary": "https://go.dev/issue/78476",
"url": "https://go.dev/issue/78476"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M",
"url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4918",
"url": "https://pkg.go.dev/vuln/GO-2026-4918"
}
],
"release_date": "2026-05-07T19:41:17.631000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"title": "net/http/internal/http2: golang: golang.org/x/net: Go HTTP/2: Denial of Service via malformed SETTINGS_MAX_FRAME_SIZE frame"
},
{
"cve": "CVE-2026-33818",
"cwe": {
"id": "CWE-776",
"name": "Improper Restriction of Recursive Entity References in DTDs (\u0027XML Entity Expansion\u0027)"
},
"discovery_date": "2026-08-13T22:12:37.151735+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2515815"
}
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"notes": [
{
"category": "description",
"text": "A flaw was found in the `encoding/asn1` package in Go. An attacker could provide a specially crafted, deeply-nested Abstract Syntax Notation One (ASN.1) structure, leading to excessive recursion during the `Unmarshal` operation. This could result in stack exhaustion and a Denial of Service (DoS) condition.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service flaw in the Go encoding/asn1 package, as it can be triggered remotely without authentication. An attacker can provide a malformed ASN.1 structure, causing excessive recursion during unmarshalling and leading to stack exhaustion, which can render the service unavailable.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
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},
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"category": "external",
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{
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-33818"
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{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33818"
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{
"category": "external",
"summary": "https://go.dev/cl/814980",
"url": "https://go.dev/cl/814980"
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{
"category": "external",
"summary": "https://go.dev/issue/80405",
"url": "https://go.dev/issue/80405"
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{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
"url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-5972",
"url": "https://pkg.go.dev/vuln/GO-2026-5972"
}
],
"release_date": "2026-08-13T21:58:52.821000+00:00",
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"title": "encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal"
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{
"cve": "CVE-2026-39820",
"cwe": {
"id": "CWE-606",
"name": "Unchecked Input for Loop Condition"
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"discovery_date": "2026-05-07T20:01:27.800929+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2467820"
}
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"notes": [
{
"category": "description",
"text": "A flaw was found in the `net/mail` package of the Go programming language. An attacker could provide specially crafted inputs to the `ParseAddress`, `ParseAddressList`, or `ParseDate` functions. This could lead to excessive consumption of CPU and memory resources, resulting in a Denial of Service (DoS) for applications processing these inputs.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/mail: golang: Go net/mail: Denial of Service via crafted email inputs",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service vulnerability in the Go `net/mail` package. Applications processing untrusted email inputs via `ParseAddress`, `ParseAddressList`, or `ParseDate` functions are susceptible to excessive resource consumption, which can lead to service unavailability.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
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"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-39820"
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{
"category": "external",
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"category": "external",
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"url": "https://go.dev/cl/759940"
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{
"category": "external",
"summary": "https://go.dev/issue/78566",
"url": "https://go.dev/issue/78566"
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{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M",
"url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4986",
"url": "https://pkg.go.dev/vuln/GO-2026-4986"
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],
"release_date": "2026-05-07T19:41:19.854000+00:00",
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
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{
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"title": "net/mail: golang: Go net/mail: Denial of Service via crafted email inputs"
},
{
"cve": "CVE-2026-39821",
"cwe": {
"id": "CWE-1289",
"name": "Improper Validation of Unsafe Equivalence in Input"
},
"discovery_date": "2026-05-22T16:00:52.844126+00:00",
"ids": [
{
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"text": "2480756"
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"notes": [
{
"category": "description",
"text": "A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname (for example, xn--example-.com returns example.com instead of an error). Applications that validate the ASCII form then convert to Unicode may grant access to a restricted hostname the ASCII check would have rejected.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "golang.org/x/net/idna is vulnerable to privilege escalation through incorrect Punycode label handling in ToASCII and ToUnicode. An attacker who can supply a Punycode hostname that passes an ASCII-only authorization check may have it normalized to a restricted ASCII name the application intended to block. Red Hat exposure is broad across products shipping the Go toolchain or bundling golang.org/x/net, including RHEL and RHEL-AI golang RPMs, hummingbird Go runtimes, OpenShift and ODF container builds, and Ceph/OpenShift components compiled against affected x/net versions.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
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"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-39821"
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"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-39821"
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{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-39821",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39821"
},
{
"category": "external",
"summary": "https://go.dev/cl/767220",
"url": "https://go.dev/cl/767220"
},
{
"category": "external",
"summary": "https://go.dev/issue/78760",
"url": "https://go.dev/issue/78760"
},
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"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8",
"url": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-5026",
"url": "https://pkg.go.dev/vuln/GO-2026-5026"
}
],
"release_date": "2026-05-22T15:01:21.462000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
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"title": "golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing"
},
{
"cve": "CVE-2026-42499",
"cwe": {
"id": "CWE-1046",
"name": "Creation of Immutable Text Using String Concatenation"
},
"discovery_date": "2026-05-07T20:00:51.685602+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2467809"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the `net/mail` package within the Go standard library. A remote attacker could provide specially crafted, pathological email addresses. When these malformed email addresses are parsed by the `consumePhrase` function, it can lead to excessive resource consumption due to quadratic string concatenation, resulting in a Denial of Service (DoS) condition.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/mail: golang: net/mail: Denial of Service via pathological email address parsing",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service vulnerability in the `net/mail` package of the Go standard library. A remote attacker can exploit this flaw by sending specially crafted email addresses, leading to excessive resource consumption and a denial of service in Go applications that parse email addresses using the affected library.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
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"category": "self",
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"category": "external",
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{
"category": "external",
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"category": "external",
"summary": "https://go.dev/cl/771520",
"url": "https://go.dev/cl/771520"
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"category": "external",
"summary": "https://go.dev/issue/78987",
"url": "https://go.dev/issue/78987"
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{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M",
"url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
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"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-4977",
"url": "https://pkg.go.dev/vuln/GO-2026-4977"
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"release_date": "2026-05-07T19:41:18.615000+00:00",
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"title": "net/mail: golang: net/mail: Denial of Service via pathological email address parsing"
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{
"cve": "CVE-2026-42504",
"cwe": {
"id": "CWE-1050",
"name": "Excessive Platform Resource Consumption within a Loop"
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"discovery_date": "2026-06-02T23:01:00.320527+00:00",
"ids": [
{
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"text": "2484204"
}
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"notes": [
{
"category": "description",
"text": "A flaw was found in the Golang MIME (Multipurpose Internet Mail Extensions) package. A remote attacker could exploit this vulnerability by sending a maliciously-crafted MIME header containing many invalid encoded-words. This could lead to excessive CPU consumption, resulting in a Denial of Service (DoS) for the affected system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is rated as an Important severity flaw. A remote attacker could trigger a Denial of Service by sending a crafted MIME header with numerous invalid encoded-words to an application utilizing the affected Golang MIME package. This could lead to excessive CPU consumption on the system processing the malformed header, impacting service availability.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
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"category": "external",
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{
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-42504"
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{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42504"
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{
"category": "external",
"summary": "https://go.dev/cl/774481",
"url": "https://go.dev/cl/774481"
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"category": "external",
"summary": "https://go.dev/issue/79217",
"url": "https://go.dev/issue/79217"
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{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw",
"url": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-5038",
"url": "https://pkg.go.dev/vuln/GO-2026-5038"
}
],
"release_date": "2026-06-02T22:01:37.219000+00:00",
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"title": "mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header"
},
{
"cve": "CVE-2026-56853",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-08-13T22:14:53.561638+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2515827"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the `net/http` component of the Go standard library. When a server is configured to support unencrypted HTTP/2, it reads initial bytes from new connections to detect the HTTP/2 client preface. However, the `ReadHeaderTimeout` is not correctly applied during this process. This oversight could allow a remote attacker to maintain open connections indefinitely, potentially leading to a Denial of Service (DoS) by exhausting server resources.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Important: Unencrypted HTTP/2 servers are susceptible to a denial of service due to improper handling of ReadHeaderTimeout during the client preface reading phase. This can lead to resource exhaustion and service unavailability in affected Red Hat products configured to support unencrypted HTTP/2.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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{
"category": "external",
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{
"category": "external",
"summary": "https://go.dev/cl/795540",
"url": "https://go.dev/cl/795540"
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"category": "external",
"summary": "https://go.dev/issue/80205",
"url": "https://go.dev/issue/80205"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
"url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-6089",
"url": "https://pkg.go.dev/vuln/GO-2026-6089"
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"release_date": "2026-08-13T21:58:53.092000+00:00",
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"title": "net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service"
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{
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"cwe": {
"id": "CWE-79",
"name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
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{
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"text": "2515838"
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{
"category": "description",
"text": "A flaw was found in the `html/template` component of Go (golang). Pathological inputs could prematurely close an unescaped forward slash (\u0027/\u0027), allowing an attacker to inject arbitrary content. This could lead to Cross-Site Scripting (XSS), where malicious scripts are executed in a user\u0027s browser, potentially compromising user data or actions.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "html/template: golang: Go html/template: Cross-Site Scripting via pathological input",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important cross-site scripting (XSS) vulnerability in the Go `html/template` package. Applications utilizing this package to render untrusted input are susceptible to arbitrary content injection due to a flaw in how pathological inputs are handled, potentially leading to client-side script execution.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Important"
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"title": "html/template: golang: Go html/template: Cross-Site Scripting via pathological input"
},
{
"cve": "CVE-2026-56859",
"cwe": {
"id": "CWE-776",
"name": "Improper Restriction of Recursive Entity References in DTDs (\u0027XML Entity Expansion\u0027)"
},
"discovery_date": "2026-08-13T22:16:52.493058+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2515840"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the `encoding/xml` package of Go. The `DecodeElement` function failed to correctly track recursion depth, which could lead to stack exhaustion. A remote attacker could exploit this vulnerability by providing a specially crafted XML input, resulting in a Denial of Service (DoS) for the affected application.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "An Important denial of service flaw affects applications utilizing the Go `encoding/xml` package. This vulnerability arises from an issue in XML decoding where a recursion depth counter fails to reset, potentially leading to stack exhaustion when processing malicious XML input.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"category": "external",
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"summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
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},
{
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"url": "https://pkg.go.dev/vuln/GO-2026-6088"
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"release_date": "2026-08-13T21:58:52.959000+00:00",
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"title": "encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue"
},
{
"cve": "CVE-2026-56860",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-08-13T22:13:18.319384+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2515820"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in `net/url`, a component of `golang`. This vulnerability arises when resolving relative paths that contain numerous parent directory (\u0027..\u0027) segments. A remote attacker could exploit this by providing a specially crafted path, leading to quadratic time complexity and excessive memory allocation. This can result in a Denial of Service (DoS) due to resource exhaustion.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service flaw in the Go `net/url` package. Applications built with Go that process untrusted URLs containing parent directory segments (\u0027..\u0027) may be vulnerable to excessive resource consumption due to quadratic time complexity in path resolution. This can lead to a denial of service, impacting the availability of affected services.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
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"category": "self",
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{
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"category": "external",
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"url": "https://go.dev/issue/80494"
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"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
"url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-6218",
"url": "https://pkg.go.dev/vuln/GO-2026-6218"
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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},
{
"cve": "CVE-2026-56862",
"cwe": {
"id": "CWE-1050",
"name": "Excessive Platform Resource Consumption within a Loop"
},
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2515839"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the `crypto/tls` package, part of `golang`. A malicious client can exploit this vulnerability by continuously sending KeyUpdate messages to a server. This forces the server to perform indefinite key derivation operations, leading to resource exhaustion and a Denial of Service (DoS) condition.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important denial of service vulnerability in the `golang` `crypto/tls` package. A remote, unauthenticated attacker can exploit this flaw by continuously sending `KeyUpdate` messages during a TLS handshake, forcing the server to perform indefinite key derivation operations. This resource exhaustion can lead to a denial of service for applications and services in Red Hat products that use the affected `crypto/tls` library and are exposed to untrusted network clients.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"references": [
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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},
{
"cve": "CVE-2026-56866",
"cwe": {
"id": "CWE-444",
"name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
},
"discovery_date": "2026-10-08T23:01:40.419728+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548347"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Go\u0027s net/http package. When an HTTP CONNECT request with a request body is rejected by a server, the client transport can desynchronize the connection before returning it to the shared idle pool. In shared reverse proxy environments, a remote attacker can exploit this issue to cause cross-user response poisoning, potentially exposing sensitive information or serving unintended content to other users.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/http: golang: golang: Cross-user response poisoning via desynchronized HTTP CONNECT connections",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A flaw of moderate impact was found in the Go standard library net/http package, which is shipped by a broad range of Red Hat products, including Red Hat Enterprise Linux (golang and go-toolset components), Red Hat Enterprise Linux AI, OpenShift Container Platform and other Go-based components across Red Hat\u0027s portfolio. When http.Transport sends an HTTP/1 CONNECT request that carries a non-empty request body, the body is written to the connection without framing after the request headers. If the server rejects the CONNECT request with a non-2xx keep-alive response, Transport returns the desynchronized connection to the shared idle pool, and the trailing body bytes can be interpreted by the server as a subsequent pipelined request. A remote attacker able to send requests through a reverse proxy (including httputil.ReverseProxy) that forwards CONNECT requests via a shared Transport could exploit this to poison the responses received by other users of the pooled connection, potentially exposing sensitive information or serving unintended content to them. Red Hat rates this flaw MODERATE (CVSS 6.5, limited confidentiality and integrity impact with no availability impact), which is lower than the CISA score of 7.5 (IMPORTANT) based on a confidentiality-only vector; Red Hat\u0027s assessment reflects that the exposure requires a shared reverse-proxy deployment that forwards CONNECT requests with bodies and yields low confidentiality and integrity impact. For most affected Red Hat products the fix is deferred because the flaw is rated MODERATE severity with a CVSS score below 7.0, so the residual risk of cross-user response poisoning in such proxy deployments remains until a fix is delivered; for a subset of affected products fixes are being pursued by their maintaining teams, and some affected streams are out of active support.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-56866"
},
{
"category": "external",
"summary": "RHBZ#2548347",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548347"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-56866",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-56866"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-56866",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56866"
},
{
"category": "external",
"summary": "https://go.dev/cl/847306",
"url": "https://go.dev/cl/847306"
},
{
"category": "external",
"summary": "https://go.dev/issue/81740",
"url": "https://go.dev/issue/81740"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI",
"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-6605",
"url": "https://pkg.go.dev/vuln/GO-2026-6605"
}
],
"release_date": "2026-10-08T22:53:58.586000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:87246"
},
{
"category": "workaround",
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],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
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{
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},
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"ids": [
{
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"text": "2548339"
}
],
"notes": [
{
"category": "description",
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"title": "Vulnerability description"
},
{
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"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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}
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{
"category": "external",
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{
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{
"category": "external",
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},
{
"category": "external",
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{
"category": "external",
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"category": "external",
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"url": "https://go.dev/issue/81857"
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{
"category": "external",
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"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
},
{
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},
{
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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},
{
"cve": "CVE-2026-78660",
"cwe": {
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"name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
},
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"title": "Vulnerability description"
},
{
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"text": "net/http: golang: golang.org/x/net/http2: net/http: HTTP response smuggling via malformed HTTP/2 framing headers",
"title": "Vulnerability summary"
},
{
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"attackVector": "NETWORK",
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
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"title": "net/http: golang: golang.org/x/net/http2: net/http: HTTP response smuggling via malformed HTTP/2 framing headers"
},
{
"cve": "CVE-2026-78663",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-10-08T23:01:32.835933+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548345"
}
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"notes": [
{
"category": "description",
"text": "A flaw was found in Go\u0027s HTTP/2 server implementation. A remote attacker can bypass connection-level flow control limits\u2014mechanisms that regulate incoming network data\u2014potentially causing excessive memory consumption and a Denial of Service (DoS). This issue occurs because the server improperly refunds flow control credits twice for the same data: once when a client resets a stream, and again when the application reads the buffered data. Consequently, a malicious client can exceed configured connection buffer limits.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/http: net/http/internal/http2: golang: golang.org/x/net/http2: golang: flow control limit bypass via double refund in HTTP/2 server",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat has evaluated this vulnerability as having a Moderate security impact because, while remote unauthenticated clients can bypass configured connection receive buffer thresholds on affected HTTP/2 servers, overall resource exhaustion remains bounded. Exploitation is constrained by stream-level flow controls and limits on concurrent streams, which prevents an attacker from causing unbounded memory consumption or a complete denial of service. Go-based network services handling untrusted HTTP/2 traffic may experience elevated memory usage under sustained reset attacks, but typical deployments remain operational without catastrophic service disruption.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
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"title": "net/http: net/http/internal/http2: golang: golang.org/x/net/http2: golang: flow control limit bypass via double refund in HTTP/2 server"
},
{
"cve": "CVE-2026-78667",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-10-08T23:00:51.418048+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548334"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Go net/http package. A remote attacker can cause a Denial of Service (DoS) by sending an HTTP request containing a Range header with a large number of small byte ranges. When the server processes these ranges while serving content, it consumes an excessive amount of CPU resources, rendering the application unresponsive to legitimate users.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/http: golang: golang: Denial of Service via crafted HTTP Range headers",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated with an Important severity for Red Hat products because an unauthenticated remote attacker can exhaust server compute resources over the network, leading to a complete service outage. Across Red Hat enterprise environments, Go is widely deployed in container runtimes, monitoring daemons, and OpenShift infrastructure components. However, exploitation is restricted to applications that actively listen on the network and serve content using standard library HTTP handlers that process multi-range requests. CLI utilities and server components that do not handle byte-range requests from untrusted clients remain unaffected.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
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{
"category": "external",
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{
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-78667"
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{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-78667",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78667"
},
{
"category": "external",
"summary": "https://go.dev/cl/847309",
"url": "https://go.dev/cl/847309"
},
{
"category": "external",
"summary": "https://go.dev/issue/81858",
"url": "https://go.dev/issue/81858"
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{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI",
"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-6609",
"url": "https://pkg.go.dev/vuln/GO-2026-6609"
}
],
"release_date": "2026-10-08T22:53:59.148000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "net/http: golang: golang: Denial of Service via crafted HTTP Range headers"
},
{
"cve": "CVE-2026-78669",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-10-08T23:01:28.964317+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548344"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Go net/http package. This flaw allows a remote attacker to cause a Denial of Service (DoS) by triggering excessive CPU consumption on an affected client or server. By opening a large number of HTTP/2 streams and repeatedly sending small configuration (SETTINGS) frames that modify window sizes, an attacker forces the system into intensive state processing. This resource exhaustion degrades performance and can render the service unresponsive.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/http: net/http/internal/http2: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A flaw was found in the Go net/http package and the golang.org/x/net/http2 module. A malicious HTTP/2 peer can cause excessive CPU consumption by opening a large number of HTTP/2 streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values. Each SETTINGS frame forces the server or client to iterate over all open streams to adjust their flow-control windows, resulting in quadratic CPU usage and denial of service.\n\nThis vulnerability affects all Go programs that serve or consume HTTP/2 traffic using net/http or golang.org/x/net/http2.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-78669"
},
{
"category": "external",
"summary": "RHBZ#2548344",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548344"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-78669",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-78669"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-78669",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78669"
},
{
"category": "external",
"summary": "https://go.dev/cl/847186",
"url": "https://go.dev/cl/847186"
},
{
"category": "external",
"summary": "https://go.dev/cl/847308",
"url": "https://go.dev/cl/847308"
},
{
"category": "external",
"summary": "https://go.dev/issue/81742",
"url": "https://go.dev/issue/81742"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI",
"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs",
"url": "https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs"
},
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"url": "https://pkg.go.dev/vuln/GO-2026-6611"
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"release_date": "2026-10-08T22:53:59.530000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "net/http: net/http/internal/http2: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames"
},
{
"cve": "CVE-2026-94439",
"cwe": {
"id": "CWE-444",
"name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
},
"discovery_date": "2026-10-08T23:00:55.470995+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548335"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Go\u0027s net/http package. When an HTTP server sends a successful response to an HTTP/1 CONNECT request without taking raw control of the connection, it improperly continues to process incoming data as standard HTTP requests instead of establishing a tunnel. A remote attacker can exploit this behavior to conduct HTTP request smuggling through intermediate proxy servers, potentially bypassing security controls.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/http: golang: net/http: HTTP request smuggling via improper handling of HTTP/1 CONNECT responses",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A moderate-impact flaw was found in the Go standard library net/http package, which is shipped in the golang and go-toolset components of Red Hat Enterprise Linux and used by many Go-based Red Hat products and components (including Red Hat Enterprise Linux AI, Red Hat In-Vehicle OS, and bundled components such as osbuild-composer and rhc). When an HTTP server handler sends a 2xx response to an HTTP/1 CONNECT request and returns without hijacking the connection, the server improperly continues to read and serve HTTP requests from a connection that should be treated as an opaque tunnel. A remote, unauthenticated attacker who can reach the server through an intermediate proxy that treats the connection as tunneled can exploit this desynchronization to conduct HTTP request smuggling, potentially bypassing proxy-enforced security controls and accessing requests or responses intended for other users. Red Hat rates this flaw Moderate severity (CVSS 3.1 base score 6.5, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N), reflecting the limited confidentiality and integrity impact. Because the impact is Moderate with a CVSS score below 7.0, fixes for the affected Red Hat products are currently deferred rather than scheduled for an immediate update, and the Red Hat In-Vehicle OS 2.0.z streams are out of support scope. The residual risk of deferral is limited to HTTP request smuggling against servers that accept HTTP/1 CONNECT requests and are deployed behind an intermediate proxy.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-94439"
},
{
"category": "external",
"summary": "RHBZ#2548335",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548335"
},
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{
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"baseScore": 6.5,
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"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
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"title": "net/http: golang: net/http: HTTP request smuggling via improper handling of HTTP/1 CONNECT responses"
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{
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"id": "CWE-770",
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"discovery_date": "2026-10-08T23:01:17.316758+00:00",
"ids": [
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}
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"notes": [
{
"category": "description",
"text": "A flaw was found in the mime/multipart and net/textproto packages in Go. A remote attacker could exploit this vulnerability by submitting a crafted multipart form request that bypasses configured memory limits when the remaining boundary limit is small. This issue allows the application to read an arbitrarily long line into memory, leading to excessive resource consumption and a Denial of Service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/textproto: mime/multipart: golang: golang: Denial of Service via memory limit bypass in multipart form parsing",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "net/textproto: mime/multipart: golang: golang: Denial of Service via memory limit bypass in multipart form parsing"
},
{
"cve": "CVE-2026-94444",
"cwe": {
"id": "CWE-354",
"name": "Improper Validation of Integrity Check Value"
},
"discovery_date": "2026-10-08T23:01:23.734635+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548343"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Go toolchain (cmd/go). When a user works inside a malicious Go project that defines a bogus golang.org/fips140 module and connects to an untrusted Go module proxy (GOMODPROXY), the proxy can serve an arbitrary replacement module that still passes local verification. This can lead to arbitrary code execution during Go build or module download operations.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "cmd/go: golang: cmd/go: arbitrary code execution via untrusted module proxy",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue is rated Moderate. Exploitation requires a developer to operate inside a maliciously crafted Go project and to use an untrusted module proxy. The golang toolchain is primarily a development and build-time component, and this is not a typical Red Hat product runtime configuration. Successful exploitation can result in arbitrary code execution as the user running the go command.\n\nGo versions before 1.24 do not include the bundled golang.org/fips140 module handling and are not affected.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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},
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{
"cvss_v3": {
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "cmd/go: golang: cmd/go: arbitrary code execution via untrusted module proxy"
},
{
"cve": "CVE-2026-94447",
"cwe": {
"id": "CWE-354",
"name": "Improper Validation of Integrity Check Value"
},
"discovery_date": "2026-10-08T23:01:20.452497+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548342"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Go toolchain (cmd/go). When a user works inside a malicious Go project that forges a golang.org/toolchain go.sum entry and uses an untrusted Go module proxy, cmd/go can skip the canonical checksum database check for toolchain downloads. A tampered toolchain may then be downloaded and executed.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "cmd/go: golang: cmd/go: Toolchain checksum verification bypass via crafted project configuration",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue is rated Moderate. Exploitation requires a developer to operate inside a maliciously crafted Go project and to use an untrusted module proxy. The golang toolchain is primarily a development and build-time component, and this is not a typical Red Hat product runtime configuration. Successful exploitation can result in execution of a tampered Go toolchain as the user running the go command.\n\nGo versions before 1.21 do not implement automatic golang.org/toolchain downloads and are not affected.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
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"category": "self",
"summary": "Canonical URL",
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},
{
"category": "external",
"summary": "RHBZ#2548342",
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{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94447"
},
{
"category": "external",
"summary": "https://go.dev/cl/840785",
"url": "https://go.dev/cl/840785"
},
{
"category": "external",
"summary": "https://go.dev/issue/81834",
"url": "https://go.dev/issue/81834"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI",
"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-6602",
"url": "https://pkg.go.dev/vuln/GO-2026-6602"
}
],
"release_date": "2026-10-08T22:53:57.974000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "cmd/go: golang: cmd/go: Toolchain checksum verification bypass via crafted project configuration"
},
{
"cve": "CVE-2026-94448",
"cwe": {
"id": "CWE-79",
"name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
},
"discovery_date": "2026-10-08T23:01:36.563246+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548346"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the html/template package in Go. This vulnerability allows a remote attacker to conduct cross-site scripting (XSS, an attack that executes malicious scripts in a user\u0027s browser) through improper output escaping. When a JavaScript template literal contains consecutive expressions, the parser fails to properly reset its context tracking state. Consequently, subsequent regular expression literals are not accurately recognized and escaped, potentially allowing untrusted content to bypass template sanitization.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "html/template: golang: golang: cross-site scripting via consecutive expressions in JavaScript template literals",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A MODERATE severity cross-site scripting (XSS) vulnerability was found in Go\u0027s html/template package, which is shipped and used across multiple Red Hat products, including Red Hat Enterprise Linux (golang and go-toolset), Red Hat Enterprise Linux AI, Red Hat In-Vehicle OS, and other components that build against the Go toolchain. When a JavaScript template literal contains consecutive expressions, the parser fails to properly reset its context tracking state upon entering a new expression. As a result, subsequent regular expression literals are not accurately recognized and escaped, allowing a remote attacker to supply untrusted content through a template that bypasses html/template sanitization and executes malicious script in a victim\u0027s browser. Successful exploitation requires a victim user to visit a rendered page of a Go web application that interpolates attacker-controlled input into JavaScript template literals. Red Hat has rated this flaw MODERATE with a CVSS 3.1 score of 6.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N), consistent with the upstream assessment; the impact is limited to low confidentiality and integrity loss within the client browser context, with no availability impact. Because the CVSS score is below 7.0, the fix is deferred for the affected Red Hat product streams and update trackers are not being filed for this MODERATE severity flaw at this time. The residual risk is limited to Go-based web applications that render attacker-controlled content through html/template into JavaScript contexts; the flaw does not affect applications that do not use html/template with JavaScript template literals.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-94448"
},
{
"category": "external",
"summary": "RHBZ#2548346",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548346"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-94448",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-94448"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-94448",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94448"
},
{
"category": "external",
"summary": "https://go.dev/cl/839866",
"url": "https://go.dev/cl/839866"
},
{
"category": "external",
"summary": "https://go.dev/issue/81821",
"url": "https://go.dev/issue/81821"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI",
"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-6599",
"url": "https://pkg.go.dev/vuln/GO-2026-6599"
}
],
"release_date": "2026-10-08T22:53:57.417000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
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"title": "html/template: golang: golang: cross-site scripting via consecutive expressions in JavaScript template literals"
},
{
"cve": "CVE-2026-97030",
"cwe": {
"id": "CWE-79",
"name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
},
"discovery_date": "2026-10-08T23:01:06.022541+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548338"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Go\u0027s html/template component. This vulnerability allows cross-site scripting (XSS) due to improper escaping of the \u0027yield\u0027 keyword during template processing. A remote attacker could exploit this flaw by providing crafted input to an affected template, leading to arbitrary script execution in a user\u0027s web browser.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "html/template: golang: html/template: Cross-site scripting via improper escaping of yield keyword",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"date": "2026-10-21T18:36:18+00:00",
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"baseScore": 6.1,
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"privilegesRequired": "NONE",
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"title": "html/template: golang: html/template: Cross-site scripting via improper escaping of yield keyword"
},
{
"cve": "CVE-2026-97031",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-10-08T23:00:59.284728+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548336"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in crypto/tls. A remote attacker can trigger this vulnerability by sending a specially crafted packet containing multiple Encrypted Client Hello (ECH) outer extension references to a server. Processing these unauthorized references leads to excessive memory consumption, causing a Denial of Service (DoS) through server crashes or unresponsiveness.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated as an Important severity flaw because an unauthenticated remote attacker can trigger memory exhaustion and crash server processes without requiring privileges or user interaction. Go applications that terminate TLS connections and accept Encrypted Client Hello configurations are vulnerable to resource amplification during the initial handshake. While the flaw does not facilitate arbitrary code execution or compromise data confidentiality, the resulting denial of service can disrupt critical network services.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references"
},
{
"cve": "CVE-2026-97032",
"cwe": {
"id": "CWE-366",
"name": "Race Condition within a Thread"
},
"discovery_date": "2026-10-08T23:01:02.635561+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2548337"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Go\u0027s net/http package. A remote attacker can cause a Denial of Service (DoS) by crashing the HTTP/2 server. Due to missing synchronization, the server concurrently modifies its HPACK (HTTP/2 header compression) encoder when encoding response headers while processing incoming table size configuration updates. A malicious client can exploit this race condition by repeatedly sending requests while altering the header table size, ultimately causing the server process to crash.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "net/http: net/http/internal/http2: golang: golang.org/x/net/http2: net/http: Denial of Service via concurrent HPACK encoder modification",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This flaw is rated with a Moderate severity for Red Hat products because, although remotely triggerable without authentication, successful exploitation relies on winning a race condition and causes only a denial of service without compromising system confidentiality or integrity. Within Red Hat environments, exposure is limited to network services and server applications built with the Go runtime that actively handle HTTP/2 connections. Applications communicating strictly over HTTP/1.1 or where client connections do not modify header compression parameters are not vulnerable.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-97032"
},
{
"category": "external",
"summary": "RHBZ#2548337",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548337"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-97032",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-97032"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-97032",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97032"
},
{
"category": "external",
"summary": "https://go.dev/cl/847188",
"url": "https://go.dev/cl/847188"
},
{
"category": "external",
"summary": "https://go.dev/cl/847313",
"url": "https://go.dev/cl/847313"
},
{
"category": "external",
"summary": "https://go.dev/issue/81867",
"url": "https://go.dev/issue/81867"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI",
"url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs",
"url": "https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2026-6617",
"url": "https://pkg.go.dev/vuln/GO-2026-6617"
}
],
"release_date": "2026-10-08T22:54:00.230000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
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},
"url": "https://access.redhat.com/errata/RHSA-2026:87246"
},
{
"category": "workaround",
"details": "Disable HTTP/2 server processing in affected Go applications by setting the environment variable GODEBUG=http2server=0, or restrict network exposure to trusted clients.\n\nFor applications managed by systemd, configure the environment variable by creating a service override:\n\nsystemctl edit \u003cservice-name\u003e\n\nAdd the following lines under the [Service] section:\n\n[Service]\nEnvironment=\"GODEBUG=http2server=0\"\n\nApply the changes and restart the daemon:\n\nsystemctl daemon-reload\nsystemctl restart \u003cservice-name\u003e\n\nTo limit network exposure using firewalld, restrict access to trusted networks:\n\nfirewall-cmd --zone=trusted --add-source=\u003ctrusted-ip-range\u003e --permanent\nfirewall-cmd --reload\n\nCaveats:\nDisabling HTTP/2 forces incoming client traffic to HTTP/1.1 and will break protocols that require HTTP/2, such as gRPC.\n\nWarning: Reloading systemd configurations and restarting the service or firewall will briefly interrupt active network sessions and cause temporary service unavailability.",
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "net/http: net/http/internal/http2: golang: golang.org/x/net/http2: net/http: Denial of Service via concurrent HPACK encoder modification"
},
{
"cve": "CVE-2026-111943",
"cwe": {
"id": "CWE-295",
"name": "Improper Certificate Validation"
},
"discovery_date": "2026-10-20T09:38:36.160000+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2556068"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Go\u0027s crypto/x509 package. The certificate verification process fails to block trust in intermediate certificates associated with a compromised Certificate Authority (CA). A remote attacker presenting a certificate signed by these intermediate authorities can impersonate legitimate servers during secure connections. This flaw can enable an attacker to conduct a man-in-the-middle (MitM) attack to intercept or alter confidential communications.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated Important because Go applications validating TLS certificates could accept unauthorized certificates issued by distrusted intermediate Certificate Authorities, potentially compromising the integrity and confidentiality of secure network communications. Any Go-based client or server relying on standard certificate verification may be exposed to man-in-the-middle attacks if an attacker intercepts traffic using certificates derived from these intermediate keys. Exploitation requires specific network positioning and certificates generated by the untrusted intermediate authorities, limiting opportunistic widespread abuse.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"summary": "https://github.com/golang/go/issues/82345",
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"summary": "https://groups.google.com/g/golang-nuts/c/K22sG2AYnKU",
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{
"category": "vendor_fix",
"date": "2026-10-21T18:36:18+00:00",
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]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"products": [
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates"
}
]
}
Loading…
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.