CVE-2026-84807 Kimai before 2.65.0 Authentication Bypass via Team Creation
An authenticated user can gain unauthorized team-lead administration rights by creating entities with names matching existing teams.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84807?
CVE-2026-84807 is a medium-severity vulnerability in kimai, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Kimai (kimai/kimai) before 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.
Weakness: CWE-266
Which versions are affected by CVE-2026-84807?
How do I fix CVE-2026-84807?
No fix has been published for CVE-2026-84807 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-84807 being exploited?
There is no known exploitation of CVE-2026-84807 in the wild and no public exploit code.
Sources
Also known as GHSA-hvq2-5gh2-rgvv, GHSA-p3c7-g2jr-3m35.