Prior to 4.1.136.Final and 4.2.16.Final, Netty's SPDY SETTINGS decoder accepts a peer-declared SETTINGS entry count up to the 24-bit frame-length… (CVE-2026-55831)
Description
CVE-2026-55831 is a medium severity vulnerability affecting Netty versions prior to 4.1.136.Final and 4.2.16.Final, as well as the strimzi-kafka-operator prior to 1.1.0-r2. It involves resource exhaustion issues (CWE-400) related to Netty's SPDY SETTINGS decoder accepting a peer-declared SETTINGS entry count up to the 24-bit frame-length. The vulnerability can cause denial of service due to resource exhaustion. No known exploits have been reported in the wild. The issue is addressed in strimzi-kafka-operator version 1.1.0-r2, which includes fixes for this and other vulnerabilities.
CVSS v3.1
Score 7.5high
Affected software
pkg:deb/ubuntu/netty?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/netty?arch=source&distro=esm-apps-legacy/xenialpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/netty?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/netty?arch=source&distro=stonkingpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-55831) affects Netty's SPDY SETTINGS decoder, which accepts a peer-declared SETTINGS entry count up to the 24-bit frame-length, potentially leading to resource exhaustion (CWE-400). It impacts Netty versions prior to 4.1.136.Final and 4.2.16.Final, as well as strimzi-kafka-operator versions prior to 1.1.0-r2. The resource exhaustion can cause denial of service conditions. The strimzi-kafka-operator version 1.1.0-r2 includes fixes for this vulnerability along with 24 other issues. No active exploitation has been observed.
Potential Impact
The vulnerability can lead to resource exhaustion resulting in denial of service (DoS) conditions. There is no impact on confidentiality or integrity reported. No known exploits are active in the wild.
Mitigation Recommendations
A fix is available in strimzi-kafka-operator version 1.1.0-r2. Users should upgrade to this version or later to remediate the vulnerability. For Netty, upgrading to version 4.1.136.Final or later (and 4.2.16.Final or later) addresses the issue. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-6jqx-86gh-f27w
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-55831"]
- Ecosystems
- ["Maven"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a6150ed9c2644c7f8da2c8f
Added to database: 07/22/2026, 23:23:25 UTC
Last enriched: 10/18/2026, 04:49:44 UTC
Last updated: 10/21/2026, 13:20:22 UTC
Views: 148
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