HIGH 7.7 NVD
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
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.
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-32r8-5843-4qw2
- https://www.vulncheck.com/advisories/vikunja-through-principal-type-confusion-via-linkshar
This high severity vulnerability with a CVSS score of 7.7 was published on 2026-08-19 via NVD.
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