======================================================================== CVE-2026-40562 CPAN Security Group ========================================================================
CVE ID: CVE-2026-40562 Distribution: Gazelle Versions: through 0.49 MetaCPAN: https://metacpan.org/dist/Gazelle VCS Repo: https://github.com/kazeburo/Gazelle Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence 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. Problem types ------------- - CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') Workarounds ----------- Migrate to Starman version 0.4018 or newer which has fixed the issue. Or apply the patch. References ---------- https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3 https://security.metacpan.org/patches/G/Gazelle/0.49/CVE-2026-40562-r1.patch Timeline -------- - 2026-04-12: Issue identified by CPANSec - 2026-04-29: Issue reported to software maintainer Credits ------- CPANSec, finder
