Security Advisory

CVE-2026-40562

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-06 12:36:34

Last updated 2026-05-07 16:13:49

Assigner CPANSec

CVSS score not scored

State PUBLISHED

Description

Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Gazelle incorrectly prioritizes "Content-Length" over "Transfer-Encoding: chunked" when both headers are present in an HTTP request. Per RFC 7230 3.3.3, Transfer-Encoding must take precedence. An attacker could exploit this to smuggle malicious HTTP requests via a front-end reverse proxy.

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