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CVE-2026-52826— Kimai: Improper Authorization in Kimai Project, Customer, and Activity Rate Edit Endpoints Allows Cross-Scope Rate Manipulation

Quick assessment

Affected
kimai kimai
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kimai 是一款开源的时间跟踪应用。在 2.57.0 版本之前，对 、 和 的 GET 或 POST 请求，会独立解析已授权的父级标识符和攻击者选定的子级费率标识符，但未验证 ProjectRate、CustomerRate 或 ActivityRate 确实属于该父级对象。因此，任何能够编辑某个父级对象（项目、客户或活动）的已认证用户，可以将该父级对象与来自未授权的项目、客户或活动的费率记录进行关联，从而在 、 或 表中持久化保存计费配置的变更。该问题已在 2.57.0 版本中修复。

CVSS 5.3 · Medium
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I. Basic Information for CVE-2026-52826

Vulnerability Information
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Vulnerability Title
Kimai: Improper Authorization in Kimai Project, Customer, and Activity Rate Edit Endpoints Allows Cross-Scope Rate Manipulation
Source: CVE Program / CVE List V5
Vulnerability Description
Kimai is an open-source time tracking application. Prior to 2.57.0, GET or POST requests to /en/admin/project/{id}/rate/{rate}, /en/admin/customer/{id}/rate/{rate}, and /en/admin/activity/{id}/rate/{rate} independently resolve the authorized parent identifier and the attacker-selected child rate identifier without confirming that the ProjectRate, CustomerRate, or ActivityRate belongs to that parent. An authenticated user who can edit one parent object can pair it with a rate record from an unauthorized project, customer, or activity and persist changes to billing configuration in kimai2_projects_rates, kimai2_customers_rates, or kimai2_activities_rates. This issue is fixed in version 2.57.0.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kimai kimai < 2.57.0 -

II. Public POCs for CVE-2026-52826

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III. Intelligence Information for CVE-2026-52826

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Patches & Fixes for CVE-2026-52826 (1)

Vendor Advisories for CVE-2026-52826 (2)

Vendor Pages for CVE-2026-52826 (1)

Same Patch Batch · kimai · 2026-09-15 · 10 CVEs total

CVE-2026-52824 9.1 CRITICAL Kimai: Default APP_SECRET in Docker Image Enables Cookie Forgery and Account Takeover
CVE-2026-52827 7.1 HIGH Kimai: Two-factor authentication bypass on the Kimai API
CVE-2026-52819 6.3 MEDIUM Kimai: Teamlead authorization bypass in GET /api/timesheets allows reading other users' ti
CVE-2026-52825 5.3 MEDIUM Kimai: Improper Authorization in Kimai Team Member and Team Activity Assignment APIs Allow
CVE-2026-52820 5.3 MEDIUM Kimai: Timesheet PATCH/POST allows assigning to project outside user's team via query_buil
CVE-2026-52823 5.3 MEDIUM Kimai: Login CSRF in Kimai Timesheet Stop and Restart API Endpoints Allows Unauthorized St
CVE-2026-52821 5.3 MEDIUM Kimai: Improper Authorization in Kimai Activity Creation with Preset Project Allows Creati
CVE-2026-52828 5.3 MEDIUM Kimai: ExportTemplate CRUD Missing Authorization Check Allows Unauthorized TEAMLEAD Access
CVE-2026-52822 5.3 MEDIUM Kimai: Improper Authorization in Kimai Timesheet Restart and Duplicate Allows New Timeshee

IV. Related Vulnerabilities

Same product: kimai
Same vendor: kimai
Same weakness: CWE-285

V. Comments for CVE-2026-52826

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