---
id: CVE-2026-52821
title: Kimai is an open-source time tracking application
summary: >-
  Kimai is an open-source time tracking application. Prior to 2.57.0, GET or
  POST requests to /en/admin/activity/create/{project} and
  /en/admin/project/create/{customer} require only the generic create_activity
  or create_project capability…
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-639
  - CWE-862
vendor: kimai
product: kimai
affected:
  - kimai < 2.57.0
patched:
  - kimai/kimai 2.57.0
published: '2026-09-15'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T15:16:47.470'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52821'
references:
  - url: >-
      https://github.com/kimai/kimai/commit/976d38e8a4485a1c923ee7b5841849e91a06e849
    label: security-advisories@github.com
  - url: 'https://github.com/kimai/kimai/pull/5929'
    label: security-advisories@github.com
  - url: 'https://github.com/kimai/kimai/releases/tag/2.57.0'
    label: security-advisories@github.com
  - url: 'https://github.com/kimai/kimai/security/advisories/GHSA-3q6q-26vg-v97x'
    label: security-advisories@github.com
  - url: 'https://www.kimai.org/en/security/ghsa-3q6q-26vg-v97x'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-3q6q-26vg-v97x'
tags:
  - nvd
  - cve.org
  - ghsa
  - composer
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-17T14:20:34.001069Z'
cvssSource: cna
epss: 0.00427
epssPercentile: 0.34272
aliases:
  - GHSA-3q6q-26vg-v97x
ecosystem: composer
ingestedAt: '2026-07-14T00:31:48.541Z'
---

## Overview

Kimai is an open-source time tracking application. Prior to 2.57.0, GET or POST requests to /en/admin/activity/create/{project} and /en/admin/project/create/{customer} require only the generic create_activity or create_project capability and do not verify edit access to the supplied Project or Customer object. A user who knows a valid project.id or customer identifier can use the preset-parent creation logic in src/Controller/ActivityController.php or src/Controller/ProjectController.php to persist a new child business object under an unauthorized parent, polluting project or customer configuration and influencing later time-entry, rate, reporting, and billing behavior. This issue is fixed in version 2.57.0.

## Remediation

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

## Package advisory (CVE-2026-52821)

Affected packages:

- `kimai/kimai <= 2.56.0`

Patched in:

- `kimai/kimai 2.57.0`

Source: https://github.com/advisories/GHSA-3q6q-26vg-v97x