CVE-2026-76235

Name	CVE-2026-76235
Description	A memory leak flaw was found in cockpit-ws. The login page handler leaks a heap allocation on every unauthenticated request that carries a CockpitLang cookie, allowing a remote unauthenticated attacker to exhaust memory on the host and cause a denial of 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)
References	DSA-6474-1
Debian Bugs	1144975

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	337-1+deb13u1	vulnerable
	trixie (security)	337-1+deb13u2	fixed
	forky, sid	367-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
cockpit	source	trixie	337-1+deb13u2		DSA-6474-1
cockpit	source	(unstable)	366-1			1144975

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=2519497
https://github.com/cockpit-project/cockpit/pull/23633
Fixed by: https://github.com/cockpit-project/cockpit/commit/233b1c178dcb95ccef356832afd9d60023d601e9