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 2.57.0, GET or POST requests to /en/admin/project/{id}/rate/{rate}, /en/admin/customer/{id}/rate/{rate}, and /en/admin/activity/{id}/rate/{rate} independently resolve the authorized parent identifier and the attacker-selected child rate identifier without confirming that the ProjectRate, CustomerRate, or ActivityRate belongs to that parent. An authenticated user who can edit one parent object can pair it with a rate record from an unauthorized project, customer, or activity and persist changes to billing configuration in kimai2_projects_rates, kimai2_customers_rates, or kimai2_activities_rates. This issue is fixed in version 2.57.0.
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 2.57.0 | 2.57.0 | Patch available | CNA |
| — | kimai/kimai (Packagist) | before 2.57.0 | 2.57.0 | Patch available | GHSA-2xgg-2x8h-8xw4 |
- kimai Vendorkimai Affected before 2.57.0 Fixed in 2.57.0 Patch available CNA
- kimai/kimai (Packagist) Vendor— Affected before 2.57.0 Fixed in 2.57.0 Patch available GHSA-2xgg-2x8h-8xw4
Remediation
- Fix · CNA kimai (kimai) Fixed in 2.57.0
- Fix · GHSA-2xgg-2x8h-8xw4 kimai/kimai (Packagist) Fixed in 2.57.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-52826
- 2026-10-03 Alias added: GHSA-2xgg-2x8h-8xw4
References
Other 6
- https://github.com/kimai/kimai/security/advisories/GHSA-2xgg-2x8h-8xw4
- https://github.com/kimai/kimai/pull/5929
- https://github.com/kimai/kimai/commit/976d38e8a4485a1c923ee7b5841849e91a06e849
- https://github.com/kimai/kimai/releases/tag/2.57.0
- https://www.kimai.org/en/security/ghsa-2xgg-2x8h-8xw4
- 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-2026-52826 · CVE Program
- CVE-2026-52826 · NVD
- FIRST EPSS
- GHSA-2xgg-2x8h-8xw4 · 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