CVE-2026-40562 — Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence
Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Gazelle incorrectly prioritizes "Content-Length" over "Transfer-Encoding: c…
Published: 2026-05-06 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7