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Vulnerability from cleanstart
Published
2026-07-30 07:10
Modified
2026-07-30 09:39
Summary
Security fixes in keycloak 26.5.7-r1
Details
Package keycloak version 26.5.7-r1 fixes 24 vulnerabilities: CVE-2026-44893, CVE-2026-44249, CVE-2026-45416, CVE-2026-45536, CVE-2026-45673...
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"package": {
"ecosystem": "Alpine",
"name": "keycloak"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "26.5.7-r1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"26.5.7-r1"
]
}
],
"credits": [],
"database_specific": {},
"details": "Package keycloak version 26.5.7-r1 fixes 24 vulnerabilities: CVE-2026-44893, CVE-2026-44249, CVE-2026-45416, CVE-2026-45536, CVE-2026-45673...",
"id": "CLEANSTART-2026-KH48438",
"modified": "2026-07-30T09:39:28Z",
"published": "2026-07-30T07:10:53Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/keycloak/keycloak"
}
],
"related": [],
"schema_version": "1.7.3",
"summary": "Security fixes in keycloak 26.5.7-r1",
"upstream": [
"CVE-2026-44893",
"CVE-2026-44249",
"CVE-2026-45416",
"CVE-2026-45536",
"CVE-2026-45673",
"CVE-2026-45674",
"CVE-2026-47244",
"CVE-2026-47691",
"CVE-2026-48043",
"CVE-2026-48059",
"CVE-2026-50010",
"CVE-2026-50020",
"CVE-2026-50560",
"CVE-2026-6860",
"ghsa-h2qv-fj59-j46j",
"ghsa-cc37-9q2j-3hfv",
"ghsa-3qp7-7mw8-wx86",
"ghsa-x4gw-5cx5-pgmh",
"ghsa-c2gf-v879-257j",
"ghsa-5x3r-wrvg-rp6q",
"ghsa-xmv7-r254-6q78",
"ghsa-563q-j3cm-6jxm",
"ghsa-5pvg-856g-cp85",
"ghsa-676x-f7gg-47vc"
]
}
CVE-2026-50010 (GCVE-0-2026-50010)
Vulnerability from cvelistv5 – Published: 2026-06-12 14:50 – Updated: 2026-07-30 12:05
VLAI
EPSS
VEX
Title
Netty's wrapping plain trust manager silently disables hostname verification
Summary
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, SimpleTrustManagerFactory.engineGetTrustManagers() and related paths wrap any user-supplied plain X509TrustManager in X509TrustManagerWrapper, which extends X509ExtendedTrustManager but implements the 3-arg checkServerTrusted(chain, authType, SSLEngine) by discarding the SSLEngine and calling the 2-arg delegate. Because the object now IS an X509ExtendedTrustManager, neither SunJSSE's internal AbstractTrustManagerWrapper nor Netty's own OpenSslX509TrustManagerWrapper will re-wrap it to add endpoint-identification. Consequently, even though Netty 4.2 sets endpointIdentificationAlgorithm="HTTPS" by default, a client built with `SslContextBuilder.forClient().trustManager(somePlainX509TrustManager)` performs no hostname verification at all. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
14 references
Impacted products
27 products
| Vendor | Product | Version | |
|---|---|---|---|
| netty | netty |
Affected:
>= 4.2.0.Final, < 4.2.15.Final
Affected: < 4.1.135.Final |
|
| Red Hat | Cryostat 4 on RHEL 9 |
Unaffected:
4.2.0-13 , < *
(rpm)
cpe:/a:redhat:cryostat:4::el9 |
|
| Red Hat | Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1 |
cpe:/a:redhat:apache_camel_quarkus:3.33 |
|
| Red Hat | Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16 |
cpe:/a:redhat:apache_camel_spring_boot:4.18 |
|
| Red Hat | Red Hat build of Quarkus 3.27.4.SP1 |
cpe:/a:redhat:quarkus:3.27::el8 |
|
| Red Hat | Red Hat build of Quarkus 3.33.2.SP1 |
cpe:/a:redhat:quarkus:3.33::el8 |
|
| Red Hat | Red Hat Data Grid 8.6.2 |
cpe:/a:redhat:jboss_data_grid:8 |
|
| Red Hat | Streams for Apache Kafka 2.9.4 |
cpe:/a:redhat:amq_streams:2.9::el9 |
|
| Red Hat | Red Hat Offline Knowledge Portal 1.2.9 |
Unaffected:
1782239370 , < *
(rpm)
cpe:/a:redhat:offline_knowledge_portal:1.2::el9 |
|
| Red Hat | OpenShift Serverless |
cpe:/a:redhat:serverless:1 |
|
| Red Hat | Red Hat AMQ Broker 7 |
cpe:/a:redhat:amq_broker:7 |
|
| Red Hat | Red Hat AMQ Clients |
cpe:/a:redhat:amq_clients:2023 |
|
| Red Hat | Red Hat build of Apache Camel 4 for Quarkus 3 |
cpe:/a:redhat:camel_quarkus:3 |
|
| Red Hat | Red Hat build of Apache Camel - HawtIO 4 |
cpe:/a:redhat:apache_camel_hawtio:4 |
|
| Red Hat | Red Hat build of Apicurio Registry 3 |
cpe:/a:redhat:apicurio_registry:3 |
|
| Red Hat | Red Hat build of Debezium 3 |
cpe:/a:redhat:debezium:3 |
|
| Red Hat | Red Hat Build of Keycloak |
cpe:/a:redhat:build_keycloak: |
|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 |
cpe:/a:redhat:enterprise_linux_ai:3 |
|
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 |
cpe:/a:redhat:jboss_enterprise_application_platform:7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
|
| Red Hat | Red Hat OpenShift Dev Spaces |
cpe:/a:redhat:openshift_devspaces:3 |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6 |
|
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7 |
|
| Red Hat | streams for Apache Kafka 3 |
cpe:/a:redhat:amq_streams:3 |
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"options": [
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},
{
"Automatable": "yes"
},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-12T16:38:52.451711Z",
"version": "2.0.3"
},
"type": "ssvc"
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}
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"packageName": "netty-handler",
"product": "Streams for Apache Kafka 2.9.4",
"vendor": "Red Hat"
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"packageName": "offline-knowledge-portal/rhokp-rhel9",
"product": "Red Hat Offline Knowledge Portal 1.2.9",
"vendor": "Red Hat",
"versions": [
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"status": "unaffected",
"version": "1782239370",
"versionType": "rpm"
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"vendor": "Red Hat"
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"vendor": "Red Hat"
},
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"product": "OpenShift Serverless",
"vendor": "Red Hat"
},
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"vendor": "Red Hat"
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"product": "OpenShift Serverless",
"vendor": "Red Hat"
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"vendor": "Red Hat"
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"vendor": "Red Hat"
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"product": "OpenShift Serverless",
"vendor": "Red Hat"
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"vendor": "Red Hat"
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"product": "Red Hat build of Debezium 3",
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CVE-2026-50020 (GCVE-0-2026-50020)
Vulnerability from cvelistv5 – Published: 2026-06-12 14:55 – Updated: 2026-06-12 15:56
VLAI
EPSS
VEX
Title
Netty's HttpObjectDecoder skips arbitrary initial control characters when only initial CRLF characters are permitted
Summary
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before reading the first request-line, `HttpObjectDecoder` skips every byte for which `Character.isISOControl(b)` is `true` (0x00–0x1F and 0x7F) as well as all whitespace. RFC 9112 §2.2 only asks servers to ignore empty CRLF lines preceding the request-line — a carefully scoped robustness allowance intended to handle HTTP/1.0 POST workarounds. Silently absorbing NUL bytes, SOH, STX, and other non-CRLF control characters goes significantly beyond this, and can be exploited for request-boundary confusion in pipelined or multiplexed transports where a front-end component treats those bytes differently. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
Impacted products
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CVE-2026-50560 (GCVE-0-2026-50560)
Vulnerability from cvelistv5 – Published: 2026-06-12 14:59 – Updated: 2026-06-13 03:21
VLAI
EPSS
VEX
Title
Netty susceptible to HTTP/2 Reset Attack with different on-the-wire signature
Summary
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, Netty HTTP/2 max header size handling produces an attack similar to HTTP/2 Rapid Reset. There is a setting in the http2 specification called `SETTINGS_MAX_HEADER_LIST_SIZE`. When a client sends that setting to Netty, it appears that Netty will behave as follows: read the request; proxy the request to the origin; attempt to produce a response; and create an exception while writing the headers for the response. Functionally, this should be similar to the http2 reset attack, but with a different on-the-wire signature. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
| https://www.rfc-editor.org/rfc/rfc9113.html#name-… | x_refsource_MISC |
Impacted products
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"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
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CVE-2026-6860 (GCVE-0-2026-6860)
Vulnerability from cvelistv5 – Published: 2026-05-06 09:55 – Updated: 2026-05-12 20:29
VLAI
EPSS
VEX
Summary
A TCP client can perform a TLS handshake and present the server name extension with a server name that is accepted by a server wildcard name, e.g. if the server is configured with a certificate accepting *.example.com, any XYZ.example.com where xyz is a valid name can be used.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Vert.x |
Affected:
4.3.4 , ≤ 4.5.26
(semver)
Affected: 5.0.0 , ≤ 5.0.11 (semver) |
Credits
Jihun Kim
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GHSA-3QP7-7MW8-WX86
Vulnerability from github – Published: 2026-06-08 19:00 – Updated: 2026-06-12 19:27
VLAI
Summary
Netty has an IPv6 Subnet Filter Bypass via Incorrect Comparator Masking
Details
Summary
An attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions.
Details
io.netty.handler.ipfilter.IpSubnetFilterRule#compareTo(java.net.InetSocketAddress) method performs a bitwise AND between the incoming IP address and the configured networkAddress, instead of the subnetMask.
Impact
Access Control Bypass. Attacker can bypass IpSubnetFilter IPv6 access controls.
Severity
8.1 (High)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.2.14.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-handler"
},
"ranges": [
{
"events": [
{
"introduced": "4.2.0.Final"
},
{
"fixed": "4.2.15.Final"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.1.134.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-handler"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.1.135.Final"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-44249"
],
"database_specific": {
"cwe_ids": [
"CWE-284",
"CWE-697"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-08T19:00:33Z",
"nvd_published_at": "2026-06-11T22:16:56Z",
"severity": "HIGH"
},
"details": "### Summary\nAn attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions.\n\n### Details\n`io.netty.handler.ipfilter.IpSubnetFilterRule#compareTo(java.net.InetSocketAddress)` method performs a bitwise AND between the incoming IP address and the configured networkAddress, instead of the subnetMask.\n\n### Impact\nAccess Control Bypass. Attacker can bypass IpSubnetFilter IPv6 access controls.",
"id": "GHSA-3qp7-7mw8-wx86",
"modified": "2026-06-12T19:27:07Z",
"published": "2026-06-08T19:00:33Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-3qp7-7mw8-wx86"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44249"
},
{
"type": "PACKAGE",
"url": "https://github.com/netty/netty"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Netty has an IPv6 Subnet Filter Bypass via Incorrect Comparator Masking"
}
GHSA-563Q-J3CM-6JXM
Vulnerability from github – Published: 2026-06-15 20:46 – Updated: 2026-06-15 20:46
VLAI
Summary
Netty susceptible to HTTP/2 Reset Attack with different on-the-wire signature
Details
Summary
Netty HTTP/2 max header size handling produces attack similar to HTTP/2 Rapid Reset.
Details
There is a setting in the http2 specification called SETTINGS_MAX_HEADER_LIST_SIZE. According to the RFC: “This advisory setting informs a peer of the maximum field section size that the sender is prepared to accept, in units of octets.”
When a client sends that setting to Netty, it appears that Netty will behave as follows:
- Read the request
- Proxy the request to the origin
- Attempt to produce a response
- Create an exception while writing the headers for the response
Functionally, this should be similar to the http2 reset attack, but with a different on-the-wire signature.
Remediation
When speaking with clients, Netty should potentially treat this as “advisory” and ignore it. It would be best to ignore the SETTINGS_MAX_HEADER_LIST_SIZE setting from clients (or ignore it when sending to clients). According to the spec, a server does not need to honor this advisory setting, and it appears that other http/2 implementations ignore it when acting as a server.
Impact
This is a DDoS attack similar to the HTTP/2 Rapid Reset Attack.
Credit
Jonathan Looney (Engineering, Netflix)
Contact
Ashley Tolbert (Security, Netflix) - artolbert@netflix.com
Severity
5.3 (Medium)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.2.14.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-codec-http2"
},
"ranges": [
{
"events": [
{
"introduced": "4.2.0.Final"
},
{
"fixed": "4.2.15.Final"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.1.134.Final"
},
"package": {
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"name": "io.netty:netty-codec-http2"
},
"ranges": [
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],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-50560"
],
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-15T20:46:56Z",
"nvd_published_at": "2026-06-12T16:16:32Z",
"severity": "MODERATE"
},
"details": "### Summary\n\nNetty HTTP/2 max header size handling produces attack similar to HTTP/2 Rapid Reset.\n\n### Details\n\nThere is a setting in the http2 specification called `SETTINGS_MAX_HEADER_LIST_SIZE`. According to[ the RFC](https://www.rfc-editor.org/rfc/rfc9113.html#name-defined-settings): \u201cThis advisory setting informs a peer of the maximum field section size that the sender is prepared to accept, in units of octets.\u201d\n\nWhen a client sends that setting to Netty, it appears that Netty will behave as follows:\n\n- Read the request\n- Proxy the request to the origin\n- Attempt to produce a response\n- Create an exception while writing the headers for the response\n\nFunctionally, this should be similar to the http2 reset attack, but with a different on-the-wire signature.\n\n## Remediation\n\nWhen speaking with clients, Netty should potentially treat this as \u201cadvisory\u201d and ignore it. It would be best to ignore the SETTINGS_MAX_HEADER_LIST_SIZE setting from clients (or ignore it when sending to clients). According to the spec, a server does not need to honor this advisory setting, and it appears that other http/2 implementations ignore it when acting as a server.\n\n### Impact\n\nThis is a DDoS attack similar to the HTTP/2 Rapid Reset Attack.\n\n## Credit\nJonathan Looney (Engineering, Netflix)\n\n## Contact\nAshley Tolbert (Security, Netflix) - artolbert@netflix.com",
"id": "GHSA-563q-j3cm-6jxm",
"modified": "2026-06-15T20:46:56Z",
"published": "2026-06-15T20:46:56Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-563q-j3cm-6jxm"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50560"
},
{
"type": "PACKAGE",
"url": "https://github.com/netty/netty"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
},
{
"type": "WEB",
"url": "https://www.rfc-editor.org/rfc/rfc9113.html#name-defined-settings"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Netty susceptible to HTTP/2 Reset Attack with different on-the-wire signature"
}
GHSA-5PVG-856G-CP85
Vulnerability from github – Published: 2026-06-08 23:02 – Updated: 2026-07-30 12:32
VLAI
Summary
Netty has Insufficient Bailiwick Validation for NS Records
Details
Summary
Netty's DnsResolveContext insufficiently validates the bailiwick of NS records, enabling DNS Cache Poisoning. An attacker controlling an authoritative name server for a subdomain can poison the cache for parent domains (like .co.uk).
Details
In io.netty.resolver.dns.DnsResolveContext.AuthoritativeNameServerList#add method accepts any NS record from the AUTHORITY section as long as the record's name is a suffix of the questionName.
This means if the resolver queries evil.co.uk., it will accept an NS record claiming authority over co.uk.. Subsequently, the handleWithAdditional method caches the associated A records from the ADDITIONAL section directly into the authoritativeDnsServerCache under the parent domain's key (co.uk.). This bypasses standard bailiwick rules, where a server authoritative for a subdomain should not be trusted to provide authoritative records for its parent. The poisoned cache is then used for all future resolutions under co.uk..
The io.netty.resolver.dns.DnsResolveContext.AuthoritativeNameServerList#cache method only prevents caching if the record is for the root zone (dots == 1).
Impact
DNS Cache Poisoning. Any application using Netty's DNS resolver is impacted.
Severity
8.7 (High)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.2.14.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-resolver-dns"
},
"ranges": [
{
"events": [
{
"introduced": "4.2.0.Final"
},
{
"fixed": "4.2.15.Final"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.1.134.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-resolver-dns"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.1.135.Final"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-47691"
],
"database_specific": {
"cwe_ids": [
"CWE-345",
"CWE-346"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-08T23:02:48Z",
"nvd_published_at": "2026-06-12T16:16:30Z",
"severity": "HIGH"
},
"details": "### Summary\nNetty\u0027s `DnsResolveContext` insufficiently validates the bailiwick of NS records, enabling DNS Cache Poisoning. An attacker controlling an authoritative name server for a subdomain can poison the cache for parent domains (like `.co.uk`).\n\n### Details\nIn `io.netty.resolver.dns.DnsResolveContext.AuthoritativeNameServerList#add` method accepts any NS record from the AUTHORITY section as long as the record\u0027s name is a suffix of the questionName.\n\nThis means if the resolver queries evil.co.uk., it will accept an NS record claiming authority over co.uk.. Subsequently, the `handleWithAdditional` method caches the associated A records from the ADDITIONAL section directly into the `authoritativeDnsServerCache` under the parent domain\u0027s key (co.uk.). This bypasses standard bailiwick rules, where a server authoritative for a subdomain should not be trusted to provide authoritative records for its parent. The poisoned cache is then used for all future resolutions under co.uk..\n\nThe `io.netty.resolver.dns.DnsResolveContext.AuthoritativeNameServerList#cache` method only prevents caching if the record is for the root zone (dots == 1).\n\n### Impact\nDNS Cache Poisoning. Any application using Netty\u0027s DNS resolver is impacted.",
"id": "GHSA-5pvg-856g-cp85",
"modified": "2026-07-30T12:32:12Z",
"published": "2026-06-08T23:02:48Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-5pvg-856g-cp85"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47691"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26017"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26018"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26586"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:34608"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:37390"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:41951"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:48151"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-47691"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488439"
},
{
"type": "PACKAGE",
"url": "https://github.com/netty/netty"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
},
{
"type": "WEB",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47691.json"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Netty has Insufficient Bailiwick Validation for NS Records"
}
GHSA-5X3R-WRVG-RP6Q
Vulnerability from github – Published: 2026-06-08 23:02 – Updated: 2026-06-12 19:30
VLAI
Summary
Netty HTTP/2: Advertised MAX_CONCURRENT_STREAMS are not enforced
Details
Impact
DefaultHttp2Connection.DefaultEndpoint initialises maxActiveStreams/maxStreams to Integer.MAX_VALUE, and Http2Settings never inserts SETTINGS_MAX_CONCURRENT_STREAMS by default (Http2Settings.java:305-307 only clamps a user-supplied value). Unless the application explicitly calls initialSettings().maxConcurrentStreams(n), a Netty HTTP/2 server advertises no limit and enforces none locally. Each open stream allocates a DefaultStream object, PropertyMap slots, flow-controller state and IntObjectHashMap entry; with ~2^30 permissible odd stream IDs a single TCP connection can create hundreds of thousands of long-lived stream objects. This is also the precondition for CVE-2023-44487-style Rapid-Reset amplification, where the absence of a low concurrent cap multiplies backend work.
Resources
https://www.rfc-editor.org/rfc/rfc7540.html#section-6.5.2
Severity
5.3 (Medium)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.2.14.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-codec-http2"
},
"ranges": [
{
"events": [
{
"introduced": "4.2.0.Final"
},
{
"fixed": "4.2.15.Final"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.1.134.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-codec-http2"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.1.135.Final"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-47244"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-08T23:02:40Z",
"nvd_published_at": "2026-06-12T15:16:29Z",
"severity": "MODERATE"
},
"details": "### Impact\nDefaultHttp2Connection.DefaultEndpoint initialises maxActiveStreams/maxStreams to Integer.MAX_VALUE, and Http2Settings never inserts SETTINGS_MAX_CONCURRENT_STREAMS by default (Http2Settings.java:305-307 only clamps a user-supplied value). Unless the application explicitly calls initialSettings().maxConcurrentStreams(n), a Netty HTTP/2 server advertises no limit and enforces none locally. Each open stream allocates a DefaultStream object, PropertyMap slots, flow-controller state and IntObjectHashMap entry; with ~2^30 permissible odd stream IDs a single TCP connection can create hundreds of thousands of long-lived stream objects. This is also the precondition for CVE-2023-44487-style Rapid-Reset amplification, where the absence of a low concurrent cap multiplies backend work.\n\n### Resources\nhttps://www.rfc-editor.org/rfc/rfc7540.html#section-6.5.2",
"id": "GHSA-5x3r-wrvg-rp6q",
"modified": "2026-06-12T19:30:17Z",
"published": "2026-06-08T23:02:40Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-5x3r-wrvg-rp6q"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47244"
},
{
"type": "PACKAGE",
"url": "https://github.com/netty/netty"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
],
"summary": "Netty HTTP/2: Advertised MAX_CONCURRENT_STREAMS are not enforced"
}
GHSA-676X-F7GG-47VC
Vulnerability from github – Published: 2026-06-08 23:02 – Updated: 2026-07-30 12:32
VLAI
Summary
Netty Vulnerable to DNS Cache Poisoning via Missing Bailiwick Checks in CNAME Records
Details
Summary
Netty's DnsResolveContext fails to validate the origin (bailiwick) of CNAME records in DNS responses.
Details
In io.netty.resolver.dns.DnsResolveContext#buildAliasMap, the resolver processes the ANSWER section of a DNS response and blindly caches all CNAME records it finds.
According to https://datatracker.ietf.org/doc/html/rfc5452#section-6
Care must be taken to only accept
data if it is known that the originator is authoritative for the
QNAME or a parent of the QNAME.
One very simple way to achieve this is to only accept data if it is
part of the domain for which the query was intended.
Impact
DNS Cache Poisoning (Bailiwick Bypass). Any application using Netty's DNS resolver is impacted.
Severity
8.7 (High)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.2.14.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-resolver-dns"
},
"ranges": [
{
"events": [
{
"introduced": "4.2.0.Final"
},
{
"fixed": "4.2.15.Final"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.1.134.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-resolver-dns"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.1.135.Final"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-45674"
],
"database_specific": {
"cwe_ids": [
"CWE-345",
"CWE-346"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-08T23:02:26Z",
"nvd_published_at": "2026-06-12T15:16:27Z",
"severity": "HIGH"
},
"details": "### Summary\nNetty\u0027s DnsResolveContext fails to validate the origin (bailiwick) of CNAME records in DNS responses.\n\n### Details\nIn `io.netty.resolver.dns.DnsResolveContext#buildAliasMap`, the resolver processes the ANSWER section of a DNS response and blindly caches all CNAME records it finds.\n\nAccording to https://datatracker.ietf.org/doc/html/rfc5452#section-6 \n\n```\nCare must be taken to only accept\n data if it is known that the originator is authoritative for the\n QNAME or a parent of the QNAME.\n One very simple way to achieve this is to only accept data if it is\n part of the domain for which the query was intended.\n```\n\n### Impact\nDNS Cache Poisoning (Bailiwick Bypass). Any application using Netty\u0027s DNS resolver is impacted.",
"id": "GHSA-676x-f7gg-47vc",
"modified": "2026-07-30T12:32:12Z",
"published": "2026-06-08T23:02:26Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-676x-f7gg-47vc"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45674"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26017"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26018"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26586"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:34608"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:37390"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:41951"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:48151"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-45674"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488400"
},
{
"type": "PACKAGE",
"url": "https://github.com/netty/netty"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
},
{
"type": "WEB",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45674.json"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Netty Vulnerable to DNS Cache Poisoning via Missing Bailiwick Checks in CNAME Records"
}
GHSA-C2GF-V879-257J
Vulnerability from github – Published: 2026-06-11 13:28 – Updated: 2026-07-30 12:32
VLAI
Summary
netty-codec-http2: ByteBuf Reference-Count Leak in DelegatingDecompressorFrameListener Leads to Memory Exhaustion
Details
Impact
The DelegatingDecompressorFrameListener class orchestrates HTTP/2 decompression by embedding a per-stream EmbeddedChannel that runs the appropriate decompression codec (gzip, deflate, zstd) and forwards decompressed chunks to a wrapped listener. Each decompressed chunk is a pooled ByteBuf handed to an anonymous ChannelInboundHandlerAdapter tail handler, which becomes the sole owner responsible for releasing it.
A remote peer could send frames that would result in the flow-controller throwing and so trigger a resource leak which at the end might take down the whole JVM due OOME.
Severity
5.3 (Medium)
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.1.134.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-codec-http2"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.1.135.Final"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.2.14.Final"
},
"package": {
"ecosystem": "Maven",
"name": "io.netty:netty-codec-http2"
},
"ranges": [
{
"events": [
{
"introduced": "4.2.0.Alpha1"
},
{
"fixed": "4.2.15.Final"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-48043"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-401",
"CWE-772"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-11T13:28:46Z",
"nvd_published_at": "2026-06-12T16:16:30Z",
"severity": "MODERATE"
},
"details": "### Impact\n\nThe `DelegatingDecompressorFrameListener` class orchestrates HTTP/2 decompression by embedding a per-stream `EmbeddedChannel` that runs the appropriate decompression codec (gzip, deflate, zstd) and forwards decompressed chunks to a wrapped listener. Each decompressed chunk is a pooled `ByteBuf` handed to an anonymous `ChannelInboundHandlerAdapter` tail handler, which becomes the sole owner responsible for releasing it.\n\nA remote peer could send frames that would result in the flow-controller throwing and so trigger a resource leak which at the end might take down the whole JVM due OOME.",
"id": "GHSA-c2gf-v879-257j",
"modified": "2026-07-30T12:32:12Z",
"published": "2026-06-11T13:28:46Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-c2gf-v879-257j"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48043"
},
{
"type": "WEB",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48043.json"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
{
"type": "PACKAGE",
"url": "https://github.com/netty/netty"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488442"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-48043"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:48151"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:48124"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:41951"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:37390"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:36820"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:34608"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26586"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26018"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26017"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
],
"summary": "netty-codec-http2: ByteBuf Reference-Count Leak in DelegatingDecompressorFrameListener Leads to Memory Exhaustion"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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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.
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