What’s Vulnerable › Vulnerabilities

CVE-2026-28685: Kimai: API invoice endpoint missing customer-level access control (IDOR)

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-06 · updated 2026-06-17
• Weakness: CWE-285

Description

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.

Affected products

• kimai: before 2.51.0 — fixed in 2.51.0

How to fix

Upgrade to a fixed version: kimai 2.51.0. Check the vendor advisory for mitigations.

References

• https://github.com/kimai/kimai/commit/a0601c8cb28fed1cca19051a8272425069ab758f
• https://github.com/kimai/kimai/releases/tag/2.51.0
• https://github.com/kimai/kimai/security/advisories/GHSA-v33r-r6h2-8wr7

Get alerted when CVE-2026-28685 or the next vulnerability affects your stack