CVE-2026-4631

Name	CVE-2026-4631
Description	Cockpit's remote login feature passes user-supplied hostnames and usernames from the web interface to the SSH client without validation or sanitization. An attacker with network access to the Cockpit web service can craft a single HTTP request to the login endpoint that injects malicious SSH options or shell commands, achieving code execution on the Cockpit host without valid credentials. The injection occurs during the authentication flow before any credential verification takes place, meaning no login is required to exploit the vulnerability.
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)
Debian Bugs	1133022

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
cockpit (PTS)	bullseye	239-1	vulnerable
	bookworm	287.1-0+deb12u3	vulnerable
	bookworm (security)	287.1-0+deb12u2	vulnerable
	trixie	337-1	vulnerable
	forky, sid	358-1	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)			1133022

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=2450246
https://github.com/cockpit-project/cockpit/pull/23105
Fixed by: https://github.com/cockpit-project/cockpit/commit/9d0695647cb6f6209e68231fd165917123aa502d (360)