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.

INFO

Published Date :

2026-05-06T12:36:34.715Z

Last Modified :

2026-05-07T16:13:49.501Z

Source :

CPANSec
AFFECTED PRODUCTS

The following products are affected by CVE-2026-40562 vulnerability.

Vendors Products
Kazeburo
  • Gazelle
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40562.

URL Resource
http://www.openwall.com/lists/oss-security/2026/05/06/7 cve-icon
https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3 cve-icon cve-icon
https://metacpan.org/release/KAZEBURO/Gazelle-0.50/changes cve-icon cve-icon
https://security.metacpan.org/patches/G/Gazelle/0.49/CVE-2026-40562-r1.patch cve-icon cve-icon
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CVSS Vulnerability Scoring System

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