VULNERABILITY INTELLIGENCE

CVE-2026-40560

CVSS score7.5 HIGH
EPSS probability0.49%
CISA KEVNot currently listed
Published2026-04-29
Last modified2026-07-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Weakness classification

  • 9b29abf9-4ab0-4765-b253-1875cd9b441e: CWE-444

Primary references