CVE-2026-84807 Details
Description
Kimai (kimai/kimai) through 2.65.0 contains a business logic / improper authorization vulnerability in the default team creation endpoints. An authenticated user with project permission-management privileges can create or use a customer, project, or activity whose name matches an existing team; because the endpoints POST /api/customers/{id}/team, POST /api/projects/{id}/team, and POST /api/activities/{id}/team reuse an existing team of the same name and add the current user as teamlead without verifying that the user is authorized to manage that team, the attacker gains unauthorized team-lead (administration) rights over the existing team. Fixed in 2.65.0.
A business logic vulnerability allowing improper authorization has been identified in Kimai versions through 2.65.0. This vulnerability exists in the default team creation endpoints for customers, projects, and activities. An authenticated user with project permission-management privileges can exploit this issue by creating or using a customer, project, or activity whose name matches that of an existing team. The vulnerable endpoints reuse the existing team, adding the current user as team lead without verifying authorization to manage that team. As a result, the user gains unauthorized administrative rights over the team.
Users can update to Kimai version 2.65.0 or later, where this vulnerability has been patched. The API endpoints now return a '410 Gone' status and direct users to 'POST /api/teams/'. Default team creation has been moved to the web interface, ensuring that teams are created from scratch without reusing existing ones.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 2, 2026CISA-ADP
Assessed Sep 2, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-266 | Incorrect Privilege Assignment | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Kimai | <= 2.65.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 2, 2026 | CVE Modified | CISA-ADP |
| Sep 2, 2026 | New CVE Received | [email protected] |