Description:
Starman versions before 0.4018 for Perl allow 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.
- https://bugs.mageia.org/show_bug.cgi?id=35448
- https://www.openwall.com/lists/oss-security/2026/04/29/1
- https://metacpan.org/release/MIYAGAWA/Starman-0.4018/changes
- https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-40560
- 9/core/perl-Starman-0.401.800-1.mga9
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