Auth bypass in Kimai
CVE-2026-28685
Kimai is a web-based multi-user time-tracking application. Prior to version 2.51.0, "GET /api/invoices/{id}" only checks the role-based view_invoice permission but does not verify the requesting user has access to the invoice's customer. Any user with ROLE_TEAMLEAD (which grants view_invoice) can read all invoices in the system, including those belonging to customers assigned to other teams. This issue has been patched in version 2.51.0.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (36.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.004 · change: -0.000
Affected products
- Kimai — versions < 2.51.0
Weakness classification (CWE)
References
- github.com/kimai/kimai/security/advisories/GHSA-v33r-r6h2-8wr7 (Exploit, Mitigation, Vendor Advisory)
- github.com/kimai/kimai/commit/a0601c8cb28fed1cca19051a8272425069ab758f (Patch)
- github.com/kimai/kimai/releases/tag/2.51.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-28685?
- CVE-2026-28685 is a medium-severity vulnerability in Kimai, classified under Improper Authorization. CVSS score: 6.5/10. Published 2026-03-06.
- How severe is CVE-2026-28685?
- Medium severity. CVSS v3 base score is 6.5 out of 10.