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.
Published: 2026-11-11
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 12 Nov 2026 13:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Eus
CPEs cpe:/a:redhat:rhel_eus:9.8::appstream
cpe:/o:redhat:rhel_eus:9.8::baseos
Vendors & Products Redhat rhel Eus
References

Thu, 12 Nov 2026 13:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:9 cpe:/a:redhat:enterprise_linux:9::appstream
cpe:/o:redhat:enterprise_linux:9::baseos
References

Thu, 12 Nov 2026 12:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:10
cpe:/a:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:10.3
cpe:/o:redhat:enterprise_linux:8::baseos
References

Thu, 12 Nov 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Wed, 11 Nov 2026 18:45:00 +0000

Type Values Removed Values Added
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.
Title Cockpit: cockpit: denial of service via unbounded fragmented websocket messages
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift Devspaces
Redhat rhel Els
Weaknesses CWE-770
CPEs cpe:/a:redhat:enterprise_linux:10
cpe:/a:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:9
cpe:/a:redhat:openshift_devspaces:3
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift Devspaces
Redhat rhel Els
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Redhat Enterprise Linux Openshift Devspaces Rhel Els Rhel Eus
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-11-12T13:32:07.208Z

Reserved: 2026-09-14T20:36:53.441Z

Link: CVE-2026-91150

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-11T19:17:47.043

Modified: 2026-11-12T14:17:30.470

Link: CVE-2026-91150

cve-icon Redhat

Severity : Important

Publid Date: 2026-11-10T23:59:00Z

Links: CVE-2026-91150 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses