CVE-2026-76216 Vikunja through 2.4.0 Principal-Type Confusion via LinkSharing

Vikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are treated as user principals with users.id == N at three permission checks lacking type guards. Attackers with a link-share JWT can remove victims from teams, enumerate and delete vict...

PT-2026-78398

Name of the Vulnerable Software and Affected Versions Vikunja versions prior to 2.4.1 Description A principal-type confusion occurs when LinkSharing principals with id N are treated as user principals with users.id == N due to three permission checks lacking type guards. This allows attackers...