CVE-2026-91149

Name	CVE-2026-91149
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.
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
	sid, forky	367-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
cockpit	source	(unstable)	(unfixed)

https://bugzilla.redhat.com/show_bug.cgi?id=2479422