Authorization Bypass Through User-Controlled Key Affecting kimai/kimai package, versions <2.57.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published14 Jul 2026
- disclosed13 Jul 2026
- creditUnknown
Introduced: 13 Jul 2026
CVE-2026-52820 (opens in a new tab)How to fix?
Upgrade kimai/kimai to version 2.57.0 or higher.
Overview
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the PATCH /api/timesheets/{id} and POST /api/timesheets endpoints, which accept a user-supplied project ID that is resolved through a query builder allowing the submitted ID to bypass access controls via an unconditional OR branch. An attacker can gain unauthorized access to project and customer metadata and manipulate their own timesheet records by submitting arbitrary project IDs, even for projects outside their team or customer scope.