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CVE-2026-76235VulnerabilityPublished

Red Hat Security Advisory: cockpit security update

Affects Red Hat cockpitSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-76235· High 7.5

Not known to be exploited · CVSS 7.5 High.

Data as of 9 Nov 2026, 19:36 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 19 Aug 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 9 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 updated Cockpit packages for Red Hat Enterprise Linux 10 and its variants that fix these vulnerabilities. Users should apply the updates as described in the Red Hat advisory RHSA-2026:96250 and the referenced article https://access.redhat.com/articles/11258 to remediate the issues. No additional mitigation steps are indicated beyond applying the official patches.

Description

Red Hat has issued a security advisory for Cockpit, a web-based server administration tool for GNU/Linux. The update addresses three vulnerabilities: two denial of service issues (CVE-2026-91147 and CVE-2026-91149) related to URL-root handling and unbounded connection thread spawning, and an unauthenticated remote memory leak (CVE-2026-76235) via the CockpitLang cookie in the login HTML response. These vulnerabilities affect Red Hat Enterprise Linux 10 and its variants. The advisory rates the impact as Important and provides updated packages to remediate the issues.

References

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