Is CVE-2026-76216 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-76216?

CVE-2026-76216 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-76216

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.