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.

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.

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.

Affected products

Kimai

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (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.