Inconsistent interpretation of HTTP requests in Netty - CVE-2026-42585

Vulnerability identifier: #VU130210

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-42585

CWE-ID: CWE-444

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to inject arbitrary HTTP requests.

The vulnerability exists due to inconsistent interpretation of HTTP requests in HttpRequestDecoder when parsing malformed Transfer-Encoding headers. A remote attacker can send a specially crafted HTTP request with a malformed "Transfer-Encoding: chunked, identity" header to inject arbitrary HTTP requests.

Exploitation is possible in deployments where a proxy forwards such malformed requests to Netty instead of rejecting them.

Netty
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Ubuntu
SUSE Package Hub 15
Development Tools Module
IBM SPSS Analytic Server
Jira Service Management Data Center
Crowd Data Center
Confluence Data Center
UCD - IBM UrbanCode Deploy
Bitbucket Data Center
Jira Software Data Center
Bamboo Data Center
Enterprise Build of Quarkus
DevOps Deploy
Rational Performance Tester
DevOps Test Performance
IBM DB2
netty-tcnative-debugsource
netty-tcnative
netty (Ubuntu package)
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
UCD - IBM UrbanCode Deploy - addressed in versions 7.2.3.24, 7.3.2.19
DevOps Deploy - addressed in versions 8.0.1.14, 8.1.2.7, 8.2.2.0
Bitbucket Data Center - addressed in versions 9.4.22, 10.2.4, 10.3.1
Jira Software Data Center - addressed in versions 9.12.28, 10.3.22, 11.3.7
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
netty (Ubuntu package) - addressed in versions 1:3.2.6.Final-2+deb8u2ubuntu0.1~esm1, 1:4.0.34-1ubuntu0.1~esm4, 1:4.1.7-4ubuntu0.1+esm6, 1:4.1.45-1ubuntu0.1~esm6, 1:4.1.48-4+deb11u2ubuntu0.1+esm3, 1:4.1.48-9ubuntu0.1+esm3, 1:4.1.48-16ubuntu0.1~esm2
netty - update to 4.1.133-150200.4.46.1
netty-javadoc - update to 4.1.133-150200.4.46.1

• https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv

• Multiple vulnerabilities in Netty
• Multiple vulnerabilities in IBM DevOps Test Performance
• Multiple vulnerabilities in IBM SPSS Analytic Server
• Ubuntu update for netty
• SUSE update for netty, netty-tcnative
• 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 Jira Software Data Center
• Multiple vulnerabilities in IBM Db2
• Multiple vulnerabilities in IBM DevOps Deploy / IBM UrbanCode Deploy (UCD)
• Multiple vulnerabilities in Bitbucket Data Center