Auth bypass in Kimai
CVE-2026-84808
Kimai versions before 2.65.0 contain an authorization bypass vulnerability in the REST API timesheet collection endpoint that fails to enforce activity-team access controls. Users with view_other_timesheet permission can list timesheets using activities restricted to teams they do not belong to, bypassing intended data isolation.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.7% 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-c6j4-35fc-x3hw (vendor-advisory)
- www.vulncheck.com/advisories/kimai-before-2.65.0-authorization-bypass-via-api-t… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-84808?
- CVE-2026-84808 is a medium-severity vulnerability in Kimai, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-09-02.
- How severe is CVE-2026-84808?
- Medium severity. CVSS v3 base score is 4.3 out of 10.