Incorrect authorization in kimai2 - CVE-2026-52819
Published: June 29, 2026
Vulnerability identifier: #VU135843
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-52819
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Kevin Papst
Affected software:
kimai2
kimai2
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in GET /api/timesheets when processing user-supplied user filters. A remote user can send a crafted request with user or users[] parameters to disclose sensitive information.
The issue affects the list endpoint but not the per-record endpoint, and exposed data can include timesheet details and financial fields such as rate and internalRate.
How to mitigate CVE-2026-52819
Install security update from vendor's website.