---
id: CVE-2026-52823
title: Kimai is an open-source time tracking application
summary: >-
  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 o…
severity: medium
cvss: 5.3
cvssVector: '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
vendor: kimai
product: kimai
affected:
  - kimai < 2.58.0
patched:
  - kimai/kimai 2.58.0
published: '2026-09-15'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:22:16.503'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52823'
references:
  - url: >-
      https://github.com/kimai/kimai/commit/31a8f887a5cda517db7b4320a7ad997c87d08601
    label: security-advisories@github.com
  - url: 'https://github.com/kimai/kimai/pull/5952'
    label: security-advisories@github.com
  - url: 'https://github.com/kimai/kimai/releases/tag/2.58.0'
    label: security-advisories@github.com
  - url: 'https://github.com/kimai/kimai/security/advisories/GHSA-r8vr-m544-qh4h'
    label: security-advisories@github.com
  - url: 'https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-r8vr-m544-qh4h'
tags:
  - nvd
  - cve.org
  - ghsa
  - composer
epss: 0.00213
epssPercentile: 0.11895
aliases:
  - GHSA-r8vr-m544-qh4h
ecosystem: composer
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T13:25:10.333245Z'
cvssSource: cna
ingestedAt: '2026-07-14T00:31:48.502Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-52823)

Affected packages:

- `kimai/kimai <= 2.57.0`

Patched in:

- `kimai/kimai 2.58.0`

Source: https://github.com/advisories/GHSA-r8vr-m544-qh4h