CVE-2026-80195: Kimai

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

Kimai before 2.63.0 contains a business logic / improper authorization vulnerability in the team update API endpoint (PATCH /api/teams/{id}), which removes all existing team members before validating the submitted replacement member list. An authenticated teamlead (or other user) with permission to edit a team can submit a malformed members payload; although Kimai returns a validation error, the existing membership rows have already been deleted. This bypasses the dedicated member-removal endpoint's protection against removing teamleaders and can leave a team with no members or teamleaders, disrupting team-based access control.

Affected products

• Kimai Kimai: before 2.63.0 (fixed in 2.63.0)

Published 2026-08-26. Last modified 2026-09-03.