{"id":"UBUNTU-CVE-2026-40560","details":"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.","modified":"2026-05-20T16:25:40.306073538Z","published":"2026-04-29T00:16:00Z","upstream":["CVE-2026-40560"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-40560"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-40560"},{"type":"REPORT","url":"https://lists.security.metacpan.org/cve-announce/msg/39426182/"}],"affected":[{"package":{"name":"starman","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/starman?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4014-1"],"ecosystem_specific":{"binaries":[{"binary_name":"starman","binary_version":"0.4014-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40560.json"}},{"package":{"name":"starman","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/starman?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4014-1"],"ecosystem_specific":{"binaries":[{"binary_name":"starman","binary_version":"0.4014-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40560.json"}},{"package":{"name":"starman","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/starman?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4014-3","0.4015-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.4015-1","binary_name":"starman"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40560.json"}},{"package":{"name":"starman","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/starman?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4015-1"],"ecosystem_specific":{"binaries":[{"binary_name":"starman","binary_version":"0.4015-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40560.json"}},{"package":{"name":"starman","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/starman?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4016-1","0.4017-1"],"ecosystem_specific":{"binaries":[{"binary_name":"starman","binary_version":"0.4017-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40560.json"}},{"package":{"name":"starman","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/starman?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4017-1"],"ecosystem_specific":{"binaries":[{"binary_name":"starman","binary_version":"0.4017-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40560.json"}},{"package":{"name":"starman","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/starman?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4017-1","0.4017-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"starman","binary_version":"0.4017-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40560.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}