{"id":"CVE-2026-91150","aliases":["DEBIAN-CVE-2026-91150","EUVD-2026-123707","GHSA-pcrv-jgr3-f337","RLSA-2026:99603","UBUNTU-CVE-2026-91150"],"status":"published","title":"Cockpit: cockpit: denial of service via unbounded fragmented websocket messages","description":"A flaw was found in Cockpit. This vulnerability allows a remote attacker, without prior authentication, to send specially crafted fragmented WebSocket messages. 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spaces"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:99599","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:99600","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:99601","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:99602","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:99603","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-91150","tags":["vdb-entry","x_refsource_REDHAT","advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2478436","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://github.com/cockpit-project/cockpit/commit/4bc66ac3e5b4923528f1ac89517a009b7bc90f93","tags":["fix","report"]},{"url":"https://github.com/cockpit-project/cockpit/releases/tag/372","tags":["web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91150","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-pcrv-jgr3-f337"},{"url":"https://access.redhat.com/downloads/content/package-browser/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91150.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-91150","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2026:99603","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2478404","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-91150","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-91150","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-91150","title":"Cockpit: cockpit: denial of service via unbounded fragmented websocket messages","description":"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.","status":"published","published":"2026-11-11T18:38:12.565Z","modified":"2026-11-12T16:44:58.47Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-12T17:45:34.63721Z"}],"euvd":[{"id":"EUVD-2026-123707","description":"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.","status":"published","published":"2026-11-11T18:38:12Z","modified":"2026-11-12T16:44:58Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-12T18:34:26.744434Z"}],"ghsa":[{"id":"GHSA-pcrv-jgr3-f337","title":"A flaw was found in Cockpit. This vulnerability allows a remote attacker, without prior...","description":"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.","status":"published","published":"2026-11-11T21:32:59Z","modified":"2026-11-12T18:31:35Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-12T18:42:37.941061Z"}],"nvd":[{"id":"CVE-2026-91150","description":"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.","status":"published","published":"2026-11-11T19:17:47.043Z","modified":"2026-11-12T17:17:47.14Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-12T19:32:19.423888Z"}],"osv":[{"id":"CVE-2026-91150","title":"Cockpit: cockpit: denial of service via unbounded fragmented websocket messages","description":"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.","status":"published","published":"2026-11-11T18:38:12.565Z","modified":"2026-11-13T02:47:37.11272069Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-13T02:57:43.261616Z"},{"id":"DEBIAN-CVE-2026-91150","description":"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.","status":"published","published":"2026-11-11T19:17:47.043Z","modified":"2026-11-13T04:00:07.637503224Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-13T04:29:18.98775Z"},{"id":"RLSA-2026:99603","title":"Important: cockpit security update","description":"Cockpit enables users to administer GNU/Linux servers using a web browser. It offers network configuration, log inspection, diagnostic reports, SELinux troubleshooting, interactive command-line sessions, and more.\n\nSecurity Fix(es):\n\n* cockpit: Cockpit: Local privilege escalation via insecure symlink handling in public key addition helper (CVE-2026-91151)\n\n* cockpit: cockpit: Denial of Service via unbounded fragmented WebSocket messages (CVE-2026-91150)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-11-13T06:01:12.940974Z","modified":"2026-11-13T06:30:09.442005736Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-13T07:01:46.260454Z"},{"id":"UBUNTU-CVE-2026-91150","description":"A flaw was found in Cockpit. 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