CVE-2026-52819

Kimai is an open-source time tracking application. Prior to 2.57.0, the GET /api/timesheets list endpoint accepts user and users[] target identifiers from a caller with view_other_timesheet but does not apply access_user or verify that a ROLE_TEAMLEAD requester leads a team containing each target user. TimesheetController::cgetAction() adds the resolved users directly to the query while project and customer filtering still permits records on unscoped projects or projects sharing ordinary team membership, allowing a teamlead to retrieve another user's descriptions, timing data, tags, rate, and internalRate even though GET /api/timesheets/{id} would deny access through TimesheetVoter. This issue is fixed in version 2.57.0.

• CWE-863

• 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-4m8q-55qv-9pwp
• https://www.kimai.org/en/security/ghsa-4m8q-55qv-9pwp
• https://github.com/kimai/kimai/security/advisories/GHSA-4m8q-55qv-9pwp

Published

Sep 15, 2026

Last Modified

Sep 23, 2026

Status

Deferred

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