CVEvulnerability
CVE-2026-40560
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-04-29
- Last modified
- 2026-07-24
- Assigner
- 9b29abf9-4ab0-4765-b253-1875cd9b441e
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-444
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.
Affected configurations
• miyagawa starman (< 0.4018)
Related
Weakness · CWE (1)
- CWE-444 Inconsistent Interpretation of HTTP Requests weakness
References
- https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3 Third Party Advisory
- https://github.com/miyagawa/Starman/commit/ced205f0805027e9d9c0731f8c40b104220604ed.patch Patch, Third Party Advisory
- https://metacpan.org/release/MIYAGAWA/Starman-0.4018/changes Product, Release Notes
- http://www.openwall.com/lists/oss-security/2026/04/29/1 Mailing List, Third Party Advisory