Is CVE-2026-40486 actively exploited?

No active exploitation of CVE-2026-40486 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40486 be exploited remotely?

Yes. CVE-2026-40486 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40486?

CVE-2026-40486 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2026-40486

CWE-915Published: April 17, 2026· Updated: Apr 20, 2026

4.3

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.8th

Official Description

Kimai is an open-source time tracking application. In versions 2.52.0 and below, the User Preferences API endpoint (PATCH /api/users/{id}/preferences) applies submitted preference values without checking the isEnabled() flag on preference objects. Although the hourly_rate and internal_rate fields are correctly marked as disabled for users lacking the hourly-rate role permission, the API ignores this restriction and saves the values directly. Any authenticated user can modify their own billing rates through this endpoint, resulting in unauthorized financial tampering affecting invoices and timesheet calculations. This issue has been fixed in version 2.53.0.

NVD Source

Technical Analysis

CVE-2026-40486 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.