CVE-2026-91149
Cockpit: cockpit: denial of service via unbounded connection thread spawning
- State
- Published
- Severity
- 7.5 High
- Published
- Sep 18, 2026
- Updated
- Oct 16, 2026
- Reserved
- Sep 14, 2026
Description
A flaw was found in Cockpit. An unauthenticated remote attacker can exploit this vulnerability by initiating and sustaining numerous simultaneous connections to the `cockpit-tls` service. This forces the service to create an unbounded number of detached threads, consuming system resources such as memory and file descriptors. The primary consequence is a denial of service (DoS), leading to degradation or complete unavailability of the Cockpit service for legitimate users.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
Red Hat Enterprise Linux 10Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat | |
Red Hat OpenShift Dev SpacesRed Hat | |
Red Hat OpenShift Dev SpacesRed Hat | |
Red Hat OpenShift Dev SpacesRed Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-91149vdb-entry
- RHBZ#2479422issue-tracking
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