CVE-2026-52823

Kimai is an open-source time tracking application. Prior to 2.58.0, TimesheetController exposes GET /api/timesheets/{id}/stop and GET /api/timesheets/{id}/restart, which reuse an authenticated browser session and perform state-changing operations through GET requests without a request-forgery defense. A remote attacker can cause a logged-in user to request either route from attacker-controlled content, stopping a running timesheet or restarting a historical entry to create and start a new timesheet without the user's consent. The unauthorized changes can corrupt time records, billing, reports, approvals, and audits. This issue is fixed in version 2.58.0.

• CWE-352

• https://github.com/kimai/kimai/commit/31a8f887a5cda517db7b4320a7ad997c87d08601
• https://github.com/kimai/kimai/pull/5952
• https://github.com/kimai/kimai/releases/tag/2.58.0
• https://github.com/kimai/kimai/security/advisories/GHSA-r8vr-m544-qh4h
• https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h

Published

Sep 15, 2026

Last Modified

Sep 23, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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