Vulnerability · Published Mar 6, 2026 · Assigned by GitHub_M

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

Medium 6.5

In plain English

A medium-severity security flaw in kimai from kimai. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 60.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	kimai/kimai	2.51.0	GHSA-v33r-r6h2-8wr7

Affected products (as reported)

Vendor	Product	Versions
kimai	kimai	< 2.51.0

Weakness: CWE-285 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

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