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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 4 Nov 2026, 04:46 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 3 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 8cockpitAffected–Fixed in–
Red Hat Enterprise Linux 9cockpitAffected–Fixed in–
Red Hat Enterprise Linux 10cockpitAffected–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 packages for Cockpit in Red Hat Enterprise Linux 9 that fix these vulnerabilities. Users should apply the security updates as described in the Red Hat advisory RHSA-2026:94533 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.

Description

Multiple security vulnerabilities have been identified in the Cockpit web-based server administration tool used in Red Hat Enterprise Linux 9. These include denial of service issues due to URL-root handling and unbounded connection thread spawning, as well as an unauthenticated remote memory leak via the CockpitLang cookie. Red Hat has issued an important security advisory with updates to address these issues.

References

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