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CVE-2026-40560

HIGH

7.5

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.

Details CVE

Score CVSS v3.17.5

SeveriteHIGH

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie4/29/2026

Derniere modification4/30/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-444

References

https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3(9b29abf9-4ab0-4765-b253-1875cd9b441e)

https://github.com/miyagawa/Starman/commit/ced205f0805027e9d9c0731f8c40b104220604ed.patch(9b29abf9-4ab0-4765-b253-1875cd9b441e)

https://metacpan.org/release/MIYAGAWA/Starman-0.4018/changes(9b29abf9-4ab0-4765-b253-1875cd9b441e)

http://www.openwall.com/lists/oss-security/2026/04/29/1(af854a3a-2127-422b-91ae-364da2661108)

Correlations IOC

Aucune correlation enregistree

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