QwikSec

Security Database

CVE

CWE

Training

CVE-2026-40560

Published: Apr 28, 2026

Modified: Apr 29, 2026

PUBLISHED

Description

Starman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Starman 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.

Vendor	Product	Versions
MIYAGAWA	Starman	affected `0 - < 0.4018`

Weaknesses (CWE)

References

https://github.com/miyagawa/Starman/commit/ced205f0805027e9d9c0731f8c40b104220604ed.patch

patch

https://metacpan.org/release/MIYAGAWA/Starman-0.4018/changes

release-notes

https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.