CVE-2026-91147
Fixed in a distro release EPSS <1%CVSS 5.9
A flaw was found in `cockpit-ws`. This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a specially crafted request. When the `WebService.UrlRoot` is configured and a request is made to the exact URL-root prefix without a trailing slash, `cockpit-ws` can terminate unexpectedly. This issue leads to the unavailability of the Cockpit web service.
Products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Dev Spaces
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | cockpit | no fix |
| Debian 13 | cockpit | no fix |
| Debian 14 | cockpit | 368-1 |
| Ubuntu 18.04 LTS | cockpit | no fix |
| Ubuntu 20.04 LTS | cockpit | no fix |
| Ubuntu 22.04 LTS | cockpit | no fix |
| Ubuntu 24.04 LTS | cockpit | no fix |
| Ubuntu 26.04 LTS | cockpit | no fix |
| Ubuntu 26.10 | cockpit | no fix |