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, 13:47 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 7cockpit | Affected– | Fixed in– |
| Red Hat OpenShift Dev Spacesdevspaces/udi-base-rhel10 | Affected– | Fixed in– |
| Red Hat OpenShift Dev Spacesdevspaces/udi-base-rhel9 | Affected– | 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
- access.redhat.com/errata/RHSA-2026:99600 (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_99600.json (opens in a new tab)