User Preferences API Vulnerability in Kimai Time Tracking Application
CVE-2026-40486

4.3MEDIUM

Key Information:

Vendor

Kimai

Status
Kimai
Vendor
CVE Published:
17 April 2026

What is CVE-2026-40486?

The Kimai time tracking application has a significant vulnerability affecting its User Preferences API, specifically in versions up to 2.52.0. This flaw allows an authenticated user to manipulate their own billing rates without proper authorization checks. Although certain fields, like hourly_rate and internal_rate, are intended to be restricted to users with specific roles, the API fails to enforce these restrictions. Consequently, this oversight permits any logged-in user to alter critical financial information, leading to potential unauthorized billing adjustments that could compromise invoice accuracy and affect timesheet calculations. This vulnerability has been addressed in version 2.53.0.

Affected Version(s)

kimai < 2.53.0

References

https://github.com/kimai/kimai/security/advisories/GHSA-q...
x_refsource_CONFIRM
https://github.com/kimai/kimai/releases/tag/2.53.0
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.