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Vulnerabilities CVE-2026-40560

CVE-2026-40560

High
Open
TLP:CLEAR

AI Analysis

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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

CVSS Score
7.5
EPSS Score
0.49%

39.6th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Confidence
90%
Published
Apr 29, 2026
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