CVE-2026-33870

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.

CVSS Vector

References

• https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8
• https://w4ke.info/2025/06/18/funky-chunks.html
• https://w4ke.info/2025/10/29/funky-chunks-2.html
• https://www.rfc-editor.org/rfc/rfc9110