CVE Catalog

CVE-2026-40562

High
Published: Translated: NVD NIST

Summary

Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling due to improper header precedence.

Risk Assessment

An attacker could exploit this vulnerability to smuggle malicious HTTP requests via a front-end reverse proxy, potentially leading to serious security breaches.

Recommendation

It is recommended to update to the latest version of Gazelle to mitigate this vulnerability and to monitor HTTP traffic for potential attacks.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS