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Vendor Workaround
Restrict network access to the Cockpit listener (TCP port 9090) to trusted management networks or localhost only, using host firewall rules such as firewalld zones or iptables rules that limit which sources may reach port 9090. If remote access to the Cockpit web console is not required, disable the listener entirely with `systemctl disable --now cockpit.socket`. External connection-rate or concurrency limits in front of TCP port 9090, such as those enforced by a firewall or reverse proxy, further reduce exploitability. Lowering the service's task or file-descriptor ceilings can reduce the blast radius, but does not correct the missing concurrency bound in the cockpit-tls accept path; fixes are being pursued for the affected product streams.
Tracking
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Mon, 21 Sep 2026 19:45:00 +0000
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Redhat openshift Dev Spaces
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Redhat openshift Dev Spaces
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Sat, 19 Sep 2026 00:15:00 +0000
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threat_severity
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threat_severity
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Fri, 18 Sep 2026 21:30:00 +0000
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ssvc
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Fri, 18 Sep 2026 16:45:00 +0000
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| 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. | |
| Title | Cockpit: cockpit: denial of service via unbounded connection thread spawning | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat openshift Devspaces |
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| Weaknesses | CWE-770 | |
| CPEs | cpe:/a:redhat:openshift_devspaces:3 cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
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Redhat
Redhat enterprise Linux Redhat openshift Devspaces |
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cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-10-16T12:17:22.173Z
Reserved: 2026-09-14T20:36:28.325Z
Link: CVE-2026-91149
Updated: 2026-09-18T16:48:37.009Z
Status : Awaiting Analysis
Published: 2026-09-18T17:17:05.563
Modified: 2026-09-30T22:16:34.037
Link: CVE-2026-91149
OpenCVE Enrichment
Updated: 2026-09-21T19:25:18Z
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CWE-770
Allocation of Resources Without Limits or Throttling