CVE-2026-76216
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Aug 19, 2026
Vendor
unknown
Description
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 victim bot users, or read team rosters by exploiting id collisions in the autoincrement space.