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.
Metrics
Affected Vendors & Products
References
History
Wed, 19 Aug 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Vikunja through 2.4.0 Principal-Type Confusion via LinkSharing | |
| First Time appeared |
Vikunja
Vikunja vikunja |
|
| Weaknesses | CWE-639 | |
| CPEs | cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Vikunja
Vikunja vikunja |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-20T16:10:29.192Z
Reserved: 2026-08-19T11:35:13.689Z
Link: CVE-2026-76216
No data.
Status : Received
Published: 2026-08-19T14:17:47.743
Modified: 2026-08-20T17:19:42.243
Link: CVE-2026-76216
No data.
OpenCVE Enrichment
Updated: 2026-08-20T16:45:16Z