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CVE-2026-91150VulnerabilityPublished

Red Hat Security Advisory: cockpit security update

Affects Red Hat cockpitSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-91150· High 7.5

Not known to be exploited · CVSS 7.5 High.

Data as of 12 Nov 2026, 13:47 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.17.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10cockpitAffected–Fixed in–
Red Hat Enterprise Linux 8cockpitAffected–Fixed in–
Red Hat Enterprise Linux 9cockpitAffected–Fixed in–
Red Hat Enterprise Linux 7cockpitAffected–Fixed in–
Red Hat OpenShift Dev Spacesdevspaces/udi-base-rhel10Affected–Fixed in–
Red Hat OpenShift Dev Spacesdevspaces/udi-base-rhel9Affected–Fixed in–

AI-suggested

Red Hat has released security updates for Cockpit on Red Hat Enterprise Linux 10 that address these vulnerabilities. Users should apply the provided updates as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258) to remediate these issues. No additional mitigation steps are indicated by the vendor advisory.

Description

Two security vulnerabilities have been identified in Cockpit, a web-based server administration tool for GNU/Linux. The first is a local privilege escalation due to insecure symbolic link handling in the public key addition helper (CVE-2026-91151). The second is a denial of service vulnerability caused by unbounded fragmented WebSocket messages (CVE-2026-91150). These issues affect Red Hat Enterprise Linux 10 across multiple architectures. Red Hat has issued security updates addressing these vulnerabilities.

References

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