{"id":"DEBIAN-CVE-2026-40561","details":"Starlet versions through 0.31 for Perl allows HTTP Request Smuggling via Improper Header Precedence.  Starlet 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.","modified":"2026-09-14T17:03:29.249654723Z","published":"2026-05-03T01:15:58.390Z","upstream":["CVE-2026-40561"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-40561"}],"affected":[{"package":{"name":"starlet","ecosystem":"Debian:12","purl":"pkg:deb/debian/starlet?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.31-2","0.31-3","0.32-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40561.json"}},{"package":{"name":"starlet","ecosystem":"Debian:13","purl":"pkg:deb/debian/starlet?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.31-2+deb13u1"}]}],"versions":["0.31-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40561.json"}},{"package":{"name":"starlet","ecosystem":"Debian:14","purl":"pkg:deb/debian/starlet?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.31-3"}]}],"versions":["0.31-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40561.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}