Resource exhaustion in Netty - CVE-2026-42587

Vulnerability identifier: #VU130215

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-42587

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in HttpContentDecompressor and DelegatingDecompressorFrameListener when processing compressed HTTP request bodies with Content-Encoding set to br, zstd, or snappy. A remote attacker can send a specially crafted compressed payload to cause a denial of service.

The configured maxAllocation limit is enforced for gzip and deflate, but is silently ignored for brotli, zstd, and snappy. The issue affects both HTTP/1.1 and HTTP/2 handling.

Netty
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Development Tools Module
SUSE Package Hub 15
IBM SPSS Analytic Server
Jira Service Management Data Center
Crowd Data Center
Confluence Data Center
Bamboo Data Center
Red Hat OpenShift Dev Spaces
Red Hat Integration Camel Extensions for Quarkus
IBM Decision Optimization for Cloud Pak for Data
Enterprise Build of Quarkus
Rational Performance Tester
DevOps Test Performance
IBM DB2
netty-tcnative-debugsource
netty-tcnative
netty
netty-javadoc

Install security update from vendor's website.

Netty - addressed in versions 4.1.133, 4.2.13
Enterprise Build of Quarkus - update to 3.27.4
Jira Service Management Data Center - addressed in versions 10.3.22, 11.3.7
Crowd Data Center - update to 7.2.1
Confluence Data Center - addressed in versions 9.2.21, 10.2.13
Bamboo Data Center - addressed in versions 10.2.20, 12.1.8
DevOps Test Performance - update to 11.0.8
netty-tcnative-debugsource - update to 2.0.77-150200.3.39.1
netty-tcnative - update to 2.0.77-150200.3.39.1
Red Hat OpenShift Dev Spaces - update to 3.28.2
Red Hat Integration Camel Extensions for Quarkus - update to 3.33.2
netty - update to 4.1.133-150200.4.46.1
netty-javadoc - update to 4.1.133-150200.4.46.1
IBM Decision Optimization for Cloud Pak for Data - update to 5.3.1 patch 6

• https://github.com/netty/netty/security/advisories/GHSA-f6hv-jmp6-3vwv

• Multiple vulnerabilities in Netty
• Multiple vulnerabilities in IBM DevOps Test Performance
• Multiple vulnerabilities in IBM SPSS Analytic Server
• SUSE update for netty, netty-tcnative
• Multiple vulnerabilities in Red Hat Integration Camel Extensions for Quarkus 3.33
• Multiple vulnerabilities in IBM Enterprise Build of Quarkus
• Multiple vulnerabilities in Bamboo Data Center
• Multiple vulnerabilities in Confluence Data Center
• Multiple vulnerabilities in Crowd Data Center
• Multiple vulnerabilities in Jira Service Management Data Center and Jira Service Management Server
• Multiple vulnerabilities in IBM Decision Optimization for Cloud Pak for Data
• Multiple vulnerabilities in IBM Db2
• Multiple vulnerabilities in Red Hat OpenShift Dev Spaces 3.28