{"id":"CVE-2026-115823","aliases":["DEBIAN-CVE-2026-115823","EUVD-2026-109560","GHSA-4q75-5w63-6hx7","UBUNTU-CVE-2026-115823","openSUSE-SU-2026:12276-1"],"status":"published","title":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections","description":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections.\n\nFor 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.\n\nOn 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.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.0035,"percentile":0.2904,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-444"],"published":"2026-10-25T16:51:19Z","modified":"2026-11-04T03:30:24Z","fixes":[{"ecosystem":"Debian:14","package":"starman","fixed_in":["0.4019-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4016-1","0.4017-1","0.4018-1","0.4019-1"]},{"source":"osv","ecosystem":"Debian:13","package":"starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4017-1","0.4018-0+deb13u1","0.4018-1","0.4019-1"]},{"source":"osv","ecosystem":"Debian:14","package":"starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4019-1"}]}],"versions":["0.4017-1","0.4018-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4014-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4014-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4014-3","0.4015-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4015-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4016-1","0.4017-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4017-1build1","0.4018-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4017-1","0.4017-1build1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"perl-Starman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4019-1.1"}]}],"bundled":4}],"references":[{"url":"https://github.com/miyagawa/Starman/commit/91c47c529cd1e100f938486896ea9083ec3ec7bf.patch","tags":["patch","fix","report"]},{"url":"https://metacpan.org/release/MIYAGAWA/Starman-0.4019/changes","tags":["release-notes","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115823","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4q75-5w63-6hx7"},{"url":"https://cpan.org/modules","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115823.json","tags":["advisory"]},{"url":"https://github.com/miyagawa/Starman","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-115823","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-115823","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-115823","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-115817","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-115822","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-115823","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-115824","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-115823","title":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections","description":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections.\n\nFor 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.\n\nOn 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.","status":"published","published":"2026-10-25T16:51:19.961Z","modified":"2026-11-02T16:12:34.205Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"adp"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T18:00:08.034842Z"}],"euvd":[{"id":"EUVD-2026-109560","description":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections.\n\nFor 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.\n\nOn 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.","status":"published","published":"2026-10-25T16:51:19Z","modified":"2026-11-02T16:12:34Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-03T05:08:40.251173Z"}],"ghsa":[{"id":"GHSA-4q75-5w63-6hx7","title":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing...","description":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections.\n\nFor 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.\n\nOn 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.","status":"published","published":"2026-10-25T18:31:41Z","modified":"2026-11-02T18:33:06Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T19:02:40.409728Z"}],"nvd":[{"id":"CVE-2026-115823","description":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections.\n\nFor 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.\n\nOn 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.","status":"published","published":"2026-10-25T17:17:01.743Z","modified":"2026-11-02T17:17:36.037Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T20:51:42.820268Z"}],"osv":[{"id":"CVE-2026-115823","title":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections","description":"Starman versions before 0.4019 for Perl send response bodies for HEAD requests, desynchronizing responses on keep-alive connections.\n\nFor 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.\n\nOn 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.","status":"published","published":"2026-10-25T16:51:19.961Z","modified":"2026-11-04T02:30:23.961713497Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-444"],"updated_at":"2026-11-04T02:55:01.518827Z"},{"id":"DEBIAN-CVE-2026-115823","description":"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.","status":"published","published":"2026-10-25T17:17:01.743Z","modified":"2026-11-03T10:00:32.428982641Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-03T10:27:58.933618Z"},{"id":"UBUNTU-CVE-2026-115823","description":"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.","status":"published","published":"2026-10-25T17:17:00Z","modified":"2026-11-04T03:30:24.696749362Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-04T03:56:39.110241Z"},{"id":"openSUSE-SU-2026:12276-1","title":"perl-Starman-0.4019-1.1 on GA media","description":"These are all security issues fixed in the perl-Starman-0.4019-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-26T00:00:00Z","modified":"2026-10-27T17:23:17.902614546Z","updated_at":"2026-11-02T16:58:40.245664Z"}]}}