{"id":"CVE-2026-91150","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-91150","summary":"Cockpit: cockpit: denial of service via unbounded fragmented websocket messages","details":"A flaw was found in Cockpit. This vulnerability allows a remote attacker, without prior authentication, to send specially crafted fragmented WebSocket messages. These messages accumulate without a total-size limit, leading to unbounded memory exhaustion and a denial of service in the `cockpit-ws` service.","published":"2026-11-11T18:38:12.565Z","modified":"2026-11-12T19:20:23.957625236Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/cockpit-project/cockpit/commit/4bc66ac3e5b4923528f1ac89517a009b7bc90f93","label":"cockpit-project/cockpit@4bc66ac"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-91150"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2478436"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91150.json"},{"type":"FIX","url":"https://github.com/cockpit-project/cockpit/commit/4bc66ac3e5b4923528f1ac89517a009b7bc90f93"},{"type":"WEB","url":"https://github.com/cockpit-project/cockpit/releases/tag/372"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91150"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-11-12T19:20:23.957625236Z"}}