GHSA-9XWC-VWWW-QQMW Duplicate Advisory: Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-32r8-5843-4qw2. This link is maintained to preserve external references. Original Description Vikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are...

Duplicate Advisory: Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-32r8-5843-4qw2. This link is maintained to preserve external references. Original Description Vikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are...

CVE-2026-76216

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...

CVE-2026-68581: Incorrect Authorization

Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because user IDs and link-share IDs are independent numeric sequences and both resolve through a generic web.Auth.GetID interface, a link-share JWT whose numeric ID equals a target user's ID is...