Red Hat Security Advisory: cockpit security update
Affects Red Hat cockpitSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 7.5 High.
Data as of 12 Nov 2026, 14:35 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 7.5 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 11 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9.8 Extended Update Supportcockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7cockpit | Affected– | Fixed in– |
| Red Hat OpenShift Dev Spacesdevspaces/udi-base-rhel10 | Affected– | Fixed in– |
AI-suggested
Red Hat has released updated Cockpit packages for Red Hat Enterprise Linux 9.8 Extended Update Support that address these vulnerabilities. Users should apply the provided security updates promptly to remediate the issues. Detailed update instructions are available in the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigations are indicated beyond applying the official patches.
Description
Two security vulnerabilities affecting the Cockpit web-based server administration tool in Red Hat Enterprise Linux 9.8 Extended Update Support have been addressed. One vulnerability (CVE-2026-91151) allows local privilege escalation due to insecure symbolic link handling in the public key addition helper. The other (CVE-2026-91150) is a denial of service caused by unbounded fragmented WebSocket messages. Red Hat has released updates to fix these issues in the Cockpit packages for multiple architectures.
References
- access.redhat.com/errata/RHSA-2026:99601 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2478404 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2478436 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_99601.json (opens in a new tab)