Kimai: Login CSRF in Kimai Timesheet Stop and Restart API Endpoints Allows Unauthorized State Changes
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Tampering
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-352.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| kimai | kimai | before 2.58.0 | 2.58.0 | Patch available | CNA |
| — | kimai/kimai (Packagist) | before 2.58.0 | 2.58.0 | Patch available | GHSA-r8vr-m544-qh4h |
- kimai Vendorkimai Affected before 2.58.0 Fixed in 2.58.0 Patch available CNA
- kimai/kimai (Packagist) Vendor— Affected before 2.58.0 Fixed in 2.58.0 Patch available GHSA-r8vr-m544-qh4h
Remediation
- Fix · CNA kimai (kimai) Fixed in 2.58.0
- Fix · GHSA-r8vr-m544-qh4h kimai/kimai (Packagist) Fixed in 2.58.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-52823
- 2026-10-03 Alias added: GHSA-r8vr-m544-qh4h
References
Other 6
- https://github.com/kimai/kimai/security/advisories/GHSA-r8vr-m544-qh4h
- https://github.com/kimai/kimai/pull/5952
- https://github.com/kimai/kimai/commit/31a8f887a5cda517db7b4320a7ad997c87d08601
- https://github.com/kimai/kimai/releases/tag/2.58.0
- https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h
- https://github.com/kimai/kimai
More kimai vulnerabilities
- TI-2023-30240 Kimai 1.30.10 SameSite Cookie Vulnerability Session Hijacking CVSS 4.0HIGH 8.5
- TI-2026-55437 Kimai before 2.58.0 Authentication Bypass via Password Reset Link CVSS 4.0HIGH 8.7
- TI-2026-55443 Kimai before 2.56.0 Authorization Bypass via TimesheetVoter CVSS 4.0CRITICAL 9.3
- TI-2026-22900 Kimai: API invoice endpoint missing customer-level access control (IDOR) CVSS 3.1MEDIUM 6.5
- TI-2026-55440 Kimai before 2.54.0 Username Enumeration via Timing Oracle CVSS 4.0MEDIUM 6.3
- TI-2026-37927 Incorrect authorization in kimai CVSS 4.0MEDIUM 6.3
Sources
- CVE-2026-52823 · CVE Program
- CVE-2026-52823 · NVD
- FIRST EPSS
- GHSA-r8vr-m544-qh4h · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences