CVE-2026-42580

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score

6.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L                                    

Vulnerability Description

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's chunk size parser silently overflows int, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.

Vulnerability Details

Published Date

May 07, 2026

Last Modified

May 18, 2026

CWE ID

CWE-190

Source

GitHub

Vendor

maven

Product

io.netty:netty-codec-http

External References

https://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723
https://github.com/advisories/GHSA-m4cv-j2px-7723

CVE-2026-42580

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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