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CVE-2026-40560

Starman

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.

CVSS 7.5EPSS 0.48700000000000004%Risk 0.78
View source
Published
2026-04-29 00:16:03
Affected versions
<0.4018
Type
Package
Last modified
2026-07-24 21:10:00
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N