Vulnerability · Published Sep 15, 2026 · Assigned by GitHub_M
CVE-2026-52822Kimai: Improper Authorization in Kimai Timesheet Restart and Duplicate Allows New Timesheets After Project Access Revocation
Medium 5.3
In plain English
A medium-severity missing authorization in kimai from kimai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Kimai is an open-source time tracking application. Prior to 2.58.0, PATCH /api/timesheets/{id}/restart, PATCH /api/timesheets/{id}/duplicate, and the web duplicate workflow can derive a new record from an owned historical timesheet after the user's access to its project or activity has been revoked. TimesheetVoter evaluates the own-timesheet permission before current team access, and its canStart() logic validates object visibility but does not verify the user's current team access to the referenced project and activity. An old entry therefore acts as a persistent capability to create new time records under an unauthorized project and activity, corrupting budgets, statistics, reports, and invoices after an administrative revocation. This issue is fixed in version 2.58.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | kimai/kimai | 2.58.0 | GHSA-c6w6-57jj-62vh |
Affected products (as reported)
Weakness: CWE-285, CWE-862 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/kimai/kimai/security/advisories/GHSA-c6w6-57jj-62vh x_refsource_CONFIRM
- https://github.com/kimai/kimai/pull/5952 x_refsource_MISC
- https://github.com/kimai/kimai/commit/31a8f887a5cda517db7b4320a7ad997c87d08601 x_refsource_MISC
- https://github.com/kimai/kimai/releases/tag/2.58.0 x_refsource_MISC
- https://www.kimai.org/en/security/ghsa-c6w6-57jj-62vh x_refsource_MISC