RHSA-2026:63119
Vulnerability from csaf_redhat - Published: 2026-09-03 23:56 - Updated: 2026-09-04 21:15Summary
Red Hat Security Advisory: grafana-pcp security update
Severity
Important
Notes
Topic: An update for grafana-pcp is now available for Red Hat Enterprise Linux 10.
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: The Grafana plugin for Performance Co-Pilot includes datasources for scalable time series from pmseries and Redis, live PCP metrics and bpftrace scripts from pmdabpftrace, as well as several dashboards.
Security Fix(es):
* mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header (CVE-2026-42504)
* 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)
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 `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
13 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
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
13 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
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
13 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
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
13 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
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
13 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
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
13 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debuginfo-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:grafana-pcp-debugsource-0:5.3.0-8.el10_2.1.x86_64 | — |
Vendor Fix
fix
|
Threats
Impact
Important
References
53 references
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},
{
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"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"
},
{
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"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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"title": "encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal"
},
{
"cve": "CVE-2026-42504",
"cwe": {
"id": "CWE-1050",
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{
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"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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"title": "crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages"
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]
}
Loading…
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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.
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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.
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.
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