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

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Main Vulnerability Database Vulnerabilities #VU130210

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

Published: May 5, 2026


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

Vulnerability details

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.


Affected software

Netty
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 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
Rational Test Virtualization Server
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
DataStax Hyper-Converged Database
Enterprise Build of Quarkus
Storage Scale
DataStage on Cloud Pak for Data
DevOps Deploy
Maximo Application Suite - Monitor Component
Rational Performance Tester
DevOps Test Virtualization
DevOps Test Integrations and APIs
DevOps Test Performance
webMethods ControlPlane
webMethods developer portal
Storage Protect Server
IBM DB2
netty-tcnative-debugsource
netty-tcnative
netty
netty-javadoc
netty (Ubuntu package)

How to mitigate CVE-2026-42585

Install security update from vendor's website.

Netty - addressed in versions 4.1.133, 4.2.13
DataStax Hyper-Converged Database - update to 1.2.7
Enterprise Build of Quarkus - update to 3.27.4
Storage Scale - addressed in versions 5.2.3.10, 6.0.1.1
DataStage on Cloud Pak for Data - addressed in versions 5.3.1 patch 9, 5.4.0.0 patch 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
Maximo Application Suite - Monitor Component - addressed in versions 9.0.23, 9.1.13, 9.2.1
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 Virtualization - update to 12.0.0
DevOps Test Integrations and APIs - update to 12.0.0
DevOps Test Performance - update to 11.0.8
webMethods ControlPlane - update to 11.1 Fix11
webMethods developer portal - update to 11.1 Fix14
netty-tcnative-debugsource - update to 2.0.77-150200.3.39.1
netty-tcnative - update to 2.0.77-150200.3.39.1
netty - update to 4.1.133-150200.4.46.1
netty-javadoc - update to 4.1.133-150200.4.46.1
Storage Protect Server - update to 8.2.2
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

External References

Related Security Bulletins