VULNERABILITY INTELLIGENCE
CVE-2026-76216
CVSS score7.7 HIGH
EPSS probability0.36%
CISA KEVNot currently listed
Published2026-08-19
Last modified2026-09-16
CVSS vectorCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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.
Weakness classification
- CWE-639: Authorization Bypass Through User-Controlled Key