Cockpit. This vulnerability · Unthrottled Resource Allocation
Source GCVE Database
Not known to be exploited · CVSS 7.5 High.
Data as of 11 Nov 2026, 22:32 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 11 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9cockpit | 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 published an advisory for this vulnerability. The advisory indicates the issue is important and under active investigation or fix development. Users should monitor Red Hat's official channels for updates and apply fixes once available. No alternative mitigations are specified in the advisory.
Description
A vulnerability in Cockpit's cockpit-ws service allows unauthenticated remote attackers to send specially crafted fragmented WebSocket messages that accumulate without a size limit, causing unbounded memory exhaustion and denial of service. This flaw affects remote management services commonly exposed on Red Hat Enterprise Linux systems. The vulnerability has a high severity rating with a CVSS score of 7.5. No specific affected versions are provided in the data. Red Hat has acknowledged the issue and provided advisory information.
References
- nvd.nist.gov/vuln/detail/CVE-2026-91150 (opens in a new tab)
- github.com/cockpit-project/cockpit/commit/4bc66ac3e5b4923528f1ac89517a009b7bc90f93 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-91150 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2478436 (opens in a new tab)
- github.com/cockpit-project/cockpit/releases/tag/372 (opens in a new tab)