# CVE-2026-52823

## Summary

- **CVE ID:** CVE-2026-52823
- **Severity:** MEDIUM
- **CVSS Score:** 5.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-352
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

Kimai is an open-source time tracking application. Prior to 2.58.0, TimesheetController exposes GET /api/timesheets/{id}/stop and GET /api/timesheets/{id}/restart, which reuse an authenticated browser session and perform state-changing operations through GET requests without a request-forgery defense. A remote attacker can cause a logged-in user to request either route from attacker-controlled content, stopping a running timesheet or restarting a historical entry to create and start a new timesheet without the user's consent. The unauthorized changes can corrupt time records, billing, reports, approvals, and audits. This issue is fixed in version 2.58.0.

## Affected Products

- kimai — kimai (< 2.58.0)

## References

- [CNA](https://github.com/kimai/kimai/security/advisories/GHSA-r8vr-m544-qh4h)
- [CNA](https://github.com/kimai/kimai/pull/5952)
- [CNA](https://github.com/kimai/kimai/commit/31a8f887a5cda517db7b4320a7ad997c87d08601)
- [CNA](https://github.com/kimai/kimai/releases/tag/2.58.0)
- [CNA](https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.21%
- **EPSS Percentile:** 11.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._