{"id":"UBUNTU-CVE-2026-115823","details":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections. For a HEAD request Starman omits chunked framing but still writes the body returned by the application, on both the array and streaming response paths. Responses with a 1xx, 204 or 304 status also carry the body. On a keep-alive or pipelined connection the client reads those bytes as the start of the next response. A front-end proxy that reuses upstream connections may then pair responses with the wrong requests.","modified":"2026-10-28T17:50:38Z","published":"2026-10-25T17:17:00Z","upstream":["CVE-2026-115823"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-115823"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-115823"},{"type":"REPORT","url":"https://github.com/miyagawa/Starman/commit/91c47c529cd1e100f938486896ea9083ec3ec7bf.patch"},{"type":"REPORT","url":"https://metacpan.org/release/MIYAGAWA/Starman-0.4019/changes"}],"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-2026-115823.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-2026-115823.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_name":"starman","binary_version":"0.4015-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115823.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-2026-115823.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_version":"0.4017-1","binary_name":"starman"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115823.json"}},{"package":{"name":"starman","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/starman?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4017-1build1","0.4018-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.4018-1","binary_name":"starman"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115823.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-2026-115823.json"}}],"schema_version":"1.9.2","severity":[{"type":"Ubuntu","score":"medium"}]}