Description

Starlet versions through 0.31 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Starlet 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 :

2026-05-03T00:57:31.519Z

Last Modified :

2026-05-07T16:45:01.655Z

Source :

CPANSec
AFFECTED PRODUCTS

The following products are affected by CVE-2026-40561 vulnerability.

Vendors Products
Kazuho
  • Starlet
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40561.

URL Resource
http://www.openwall.com/lists/oss-security/2026/05/03/1 cve-icon
https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3 cve-icon cve-icon
https://github.com/kazuho/Starlet/commit/a7d5dfd1862aafa43e5eaca0fdb6acf4cc15b2d0.patch cve-icon cve-icon
https://metacpan.org/release/KAZUHO/Starlet-0.32/changes cve-icon cve-icon
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