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
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-42580
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Netty
Software vendor:
Netty project

Description

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.


Remediation

Install security update from vendor's website.

External links