high7.5
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 == …
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | code.vikunja.io/api | < 2.5.0 | 2.5.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-32r8-5843-4qw2
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-32r8-5843-4qw2
- https://nvd.nist.gov/vuln/detail/CVE-2026-76216
- https://www.vulncheck.com/advisories/vikunja-through-principal-type-confusion-via-linksharing
- https://github.com/go-vikunja/vikunja/commit/a717d64d5658708ba390f18dd697f5e567e68aac
- https://github.com/go-vikunja/vikunja/releases/tag/v2.5.0