Inconsistent interpretation of HTTP requests in Netty - CVE-2026-42580

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Main Vulnerability Database Vulnerabilities #VU130211

Inconsistent interpretation of HTTP requests in Netty - CVE-2026-42580

Published: May 5, 2026


Vulnerability identifier: #VU130211
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-42580
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 io.netty.handler.codec.http.HttpObjectDecoder#getChunkSize when parsing chunked HTTP requests. A remote attacker can send a specially crafted chunked request to inject arbitrary HTTP requests.


Affected software

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 LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
Development Tools Module
SUSE Package Hub 15
IBM SPSS Analytic Server
UCD - IBM UrbanCode Deploy
Enterprise Build of Quarkus
DevOps Deploy
Rational Performance Tester
DevOps Test Performance
IBM DB2
netty-tcnative-debugsource
netty-tcnative
netty
netty-javadoc

How to mitigate CVE-2026-42580

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
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
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 - update to 4.1.133-150200.4.46.1
netty-javadoc - update to 4.1.133-150200.4.46.1

External References

Related Security Bulletins