---
id: CVE-2026-80197
title: >-
  Kimai before 2.57.0 contains an improper authorization vulnerability in the
  favorite timesheet add and remove endpoints that allows authenticated users to
  manipulate other users' bookmarks
summary: >-
  Kimai before 2.57.0 contains an improper authorization vulnerability in the
  favorite timesheet add and remove endpoints that allows authenticated users to
  manipulate other users' bookmarks. Attackers can add or remove timesheet
  entries f…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-639
vendor: kimai
product: kimai
affected:
  - kimai < 2.57.0
published: '2026-08-26'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T16:17:45.540'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80197'
references:
  - url: 'https://github.com/kimai/kimai/security/advisories/GHSA-j5mc-p8qg-39j7'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/kimai-before-2.57.0-improper-authorization-via-favorite-endpoints
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-26T13:45:05.239944Z'
epss: 0.00264
epssPercentile: 0.16807
ingestedAt: '2026-10-08T16:52:14.726Z'
---

## Overview

Kimai before 2.57.0 contains an improper authorization vulnerability in the favorite timesheet add and remove endpoints that allows authenticated users to manipulate other users' bookmarks. Attackers can add or remove timesheet entries from another user's favorite list by referencing their timesheet identifier, enabling cross-user business-state tampering without administrative privileges.

## Remediation

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