Improper authorization in kimai
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- 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-285.
Summary
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can derive a new record from an owned historical timesheet after the user's access to its project or activity has been revoked.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.
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-c6w6-57jj-62vh |
- 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-c6w6-57jj-62vh
Remediation
- Fix · CNA kimai (kimai) Fixed in 2.58.0
- Fix · GHSA-c6w6-57jj-62vh kimai/kimai (Packagist) Fixed in 2.58.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-52822
- 2026-10-03 Alias added: GHSA-c6w6-57jj-62vh
References
Other 6
- https://github.com/kimai/kimai/security/advisories/GHSA-c6w6-57jj-62vh
- 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-c6w6-57jj-62vh
- 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-2026-52822 · CVE Program
- CVE-2026-52822 · NVD
- FIRST EPSS
- GHSA-c6w6-57jj-62vh · 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