Vulnerability Description
Kimai is an open-source time tracking application. Prior to 2.57.0, PATCH /api/timesheets/{id} and POST /api/timesheets accept a user-controlled project identifier through TimesheetApiEditForm and FormTrait, and ProjectRepository::getQueryBuilderForFormType() places that identifier in an unconditional OR branch that bypasses the team access criteria. Any authenticated user with edit_own_timesheet can therefore assign an owned timesheet to a project outside the user's teams, persist unauthorized project attribution, and retrieve project and customer metadata through GET /api/timesheets/{id}?full=true. TimesheetTeamAccessValidator now checks changed project and activity associations against current team access. This issue is fixed in version 2.57.0.
Related Weaknesses (CWE)
References
- https://github.com/kimai/kimai/commit/976d38e8a4485a1c923ee7b5841849e91a06e849
- https://github.com/kimai/kimai/pull/5929
- https://github.com/kimai/kimai/releases/tag/2.57.0
- https://github.com/kimai/kimai/security/advisories/GHSA-vrr2-g9gh-c3jc
- https://www.kimai.org/en/security/ghsa-vrr2-g9gh-c3jc
FAQ
What is CVE-2026-52820?
CVE-2026-52820 is a documented vulnerability. Kimai is an open-source time tracking application. Prior to 2.57.0, PATCH /api/timesheets/{id} and POST /api/timesheets accept a user-controlled project identifier through TimesheetApiEditForm and For...
How severe is CVE-2026-52820?
CVSS scoring is not yet available for CVE-2026-52820. Check NVD for updates.
Is there a patch for CVE-2026-52820?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.