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

March 4, 2026 (updated March 6, 2026)

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.

References

github.com/advisories/GHSA-v33r-r6h2-8wr7
github.com/kimai/kimai
github.com/kimai/kimai/commit/a0601c8cb28fed1cca19051a8272425069ab758f
github.com/kimai/kimai/releases/tag/2.51.0
github.com/kimai/kimai/security/advisories/GHSA-v33r-r6h2-8wr7
nvd.nist.gov/vuln/detail/CVE-2026-28685

Code Behaviors & Features

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