Vulnerability in Kimai
CVE-2026-84804
Kimai before 2.65.0 fails to properly validate permissions when removing team access to activities, projects, and customers via API endpoints. Authenticated users with edit_team permission can revoke team access without the required permissions_activity check, bypassing authorization controls.
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: 0.003 (24.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/kimai/kimai/security/advisories/GHSA-mc86-77vp-82g3 (vendor-advisory)
- www.vulncheck.com/advisories/kimai-before-2.65.0-authorization-bypass-via-team-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-84804?
- CVE-2026-84804 is a medium-severity vulnerability in Kimai, classified under Improper Access Control. CVSS score: 5.4/10. Published 2026-09-02.
- How severe is CVE-2026-84804?
- Medium severity. CVSS v3 base score is 5.4 out of 10.