starman: Starman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header Precedence
CVE-2026-40560 is fixed in starman on 1 platform, first by DEBIAN-CVE-2026-40560, released May 27, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| starman · Debian 13.5 (trixie) | 0.4018-0+deb13u1 | DEBIAN-CVE-2026-40560 | May 27, 2026 |
| starman · Debian 14 | 0.4018-1 | DEBIAN-CVE-2026-40560 | May 27, 2026 |
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