Vulnerability in Kimai
CVE-2026-80195
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (27.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/kimai/kimai/security/advisories/GHSA-6rxf-4hh9-pp46 (vendor-advisory)
- www.vulncheck.com/advisories/kimai-before-2.63.0-team-membership-removal-via-api (third-party-advisory)
Frequently asked questions
- What is CVE-2026-80195?
- CVE-2026-80195 is a medium-severity vulnerability in Kimai, classified under Improper Enforcement of Behavioral Workflow. CVSS score: 5.4/10. Published 2026-08-26.
- How severe is CVE-2026-80195?
- Medium severity. CVSS v3 base score is 5.4 out of 10.