CVE-2026-42580 Security Details

CVE ID

CVE-2026-42580

CWE

CWE-190

CWE-444

CVE 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.

Published

May 7, 2026

CVSS Score & Severity

6.5Medium

CVSS Vector

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

EPSS Score

0.018%

Malware

malware

KEV Status

Not in KEV Catalog: No known exploits

Affected Ecosystems

affected

Source

National Vulnerability Database

References

GitHub · Advisory · GHSA-m4cv-j2px-7723THIRD_PARTY