---
id: CVE-2026-80202
title: >-
  Kimai before 2.56.0 does not enforce team-membership checks in
  TimesheetVoter::voteOnAttribute(), which maps permissions only to
  own_timesheet or other_timesheet
summary: >-
  Kimai before 2.56.0 does not enforce team-membership checks in
  TimesheetVoter::voteOnAttribute(), which maps permissions only to
  own_timesheet or other_timesheet. As a result, any authenticated user with
  ROLE_TEAMLEAD (or a role holding …
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-863
vendor: kimai
product: kimai
affected:
  - kimai < 2.56.0
published: '2026-08-26'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T16:17:46.260'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80202'
references:
  - url: 'https://github.com/kimai/kimai/security/advisories/GHSA-9g2q-w3w2-vf7q'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/kimai-before-2.56.0-authorization-bypass-via-timesheetvoter
    label: disclosure@vulncheck.com
  - url: 'https://github.com/kimai/kimai/security/advisories/GHSA-9g2q-w3w2-vf7q'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-26T13:55:03.742163Z'
epss: 0.00447
epssPercentile: 0.3681
ingestedAt: '2026-10-08T16:52:14.731Z'
---

## Overview

Kimai before 2.56.0 does not enforce team-membership checks in TimesheetVoter::voteOnAttribute(), which maps permissions only to own_timesheet or other_timesheet. As a result, any authenticated user with ROLE_TEAMLEAD (or a role holding edit_other_timesheet/delete_other_timesheet) can read, modify, and permanently delete timesheets belonging to any user system-wide via the API, regardless of team membership. Timesheet IDs are sequential integers and trivially enumerable. ROLE_USER accounts are correctly restricted. (Note: the maintainers characterize this behavior as matching the documented permission model.)

## Remediation

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