Home

Description

Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.

PUBLISHED Reserved 2026-03-24 | Published 2026-03-27 | Updated 2026-03-31 | Assigner GitHub_M




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Problem types

CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Product status

< 4.1.132.Final
affected

>= 4.2.0.Alpha1, < 4.2.10.Final
affected

References

github.com/.../netty/security/advisories/GHSA-pwqr-wmgm-9rr8

w4ke.info/2025/06/18/funky-chunks.html

w4ke.info/2025/10/29/funky-chunks-2.html

www.rfc-editor.org/rfc/rfc9110

cve.org (CVE-2026-33870)

nvd.nist.gov (CVE-2026-33870)

Download JSON