CVE-2026-56774

Name	CVE-2026-56774
Description	Kanboard through 1.2.52, fixed in commit 928c68a, UserViewController::removeSession fails to validate the session id parameter before passing it to RememberMeSessionModel::remove, allowing authenticated users to delete other users' Remember Me sessions. Attackers can enumerate sequential session IDs and mass-invalidate persistent login sessions of any user, including administrators, forcing re-authentication and causing 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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
kanboard (PTS)	sid	1.2.51+ds-2	vulnerable

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

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

Notes

https://github.com/kanboard/kanboard/issues/5829
https://github.com/kanboard/kanboard/pull/5831
Fixed by: https://github.com/kanboard/kanboard/commit/928c68aa2b7c00092dd71084d329b912e229f3d1