Medium severity · published Mar 6, 2026
CVE-2026-28685
Kimai: API invoice endpoint missing customer-level access control (IDOR)
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
kimai · kimai
< 2.51.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28685
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28685
Patch
https://github.com/kimai/kimai/commit/a0601c8cb28fed1cca19051a8272425069ab758f
Product
https://github.com/kimai/kimai/releases/tag/2.51.0
Exploit
https://github.com/kimai/kimai/security/advisories/GHSA-v33r-r6h2-8wr7
More from kimai
9.6
CVE-2020-19825
Cross Site Scripting (XSS) vulnerability in kevinpapst kimai2 1.30.0 in /src/Twig/Runtime/MarkdownExtension.php, allows attackers to gain escalated privileges
9.1
CVE-2026-52824
Kimai: Default APP_SECRET in Docker Image Enables Cookie Forgery and Account Takeover
8.8
CVE-2026-80202
Kimai before 2.56.0 Authorization Bypass via TimesheetVoter
8.8
CVE-2026-80193
Kimai before 2.62.0 Authorization Bypass via QuickEntry
8.8
CVE-2023-53957
Kimai 1.30.10 SameSite Cookie Vulnerability Session Hijacking