CVE-2026-91147

Name	CVE-2026-91147
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
cockpit (PTS)	bookworm	287.1-0+deb12u3	vulnerable
	bookworm (security)	287.1-0+deb12u2	vulnerable
	trixie (security), trixie	337-1+deb13u2	vulnerable
	forky, sid	368-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
cockpit	source	(unstable)	368-1

Notes

[trixie] - cockpit <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2479230
https://github.com/cockpit-project/cockpit/commit/78afe1d587afb6b380e1b8999a0955ad09c31902 (368)