Red Hat Security Advisory: cockpit security update
Affects Red Hat cockpitSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 7.5 High · fixed in Red Hat Enterprise Linux 10 package updates : patch Red Hat cockpit soon.
Data as of 12 Nov 2026, 18:22 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 7.5 |
|---|
- Patch
- Available – fixed in 10.2
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 10.2 Extended Update Supportcockpit | 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– |
AI-suggested
Red Hat has released security updates for Cockpit in Red Hat Enterprise Linux 10.2 Extended Update Support and other support streams. Users should apply the updated Cockpit packages provided by Red Hat to remediate these vulnerabilities. Refer to Red Hat's official advisory and update instructions at https://access.redhat.com/articles/11258 for detailed remediation steps.
Description
Two security vulnerabilities were addressed in the Cockpit web-based server administration tool for Red Hat Enterprise Linux 10.2. The first is a local privilege escalation caused by insecure symbolic link handling in the public key addition helper (CVE-2026-91151). The second is a denial of service vulnerability due to unbounded fragmented WebSocket messages (CVE-2026-91150). These issues could allow an attacker with local access to escalate privileges or cause service disruption. Red Hat has released updates to fix these vulnerabilities in the affected Cockpit packages.
References
- access.redhat.com/errata/RHSA-2026:99599 (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_99599.json (opens in a new tab)