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CVE-2026-52822— Kimai: Improper Authorization in Kimai Timesheet Restart and Duplicate Allows New Timesheets After Project Access Revocation

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程序。在 2.58.0 版本之前， 、 以及 Web 端的“重复”工作流允许用户从其拥有的历史时间记录派生新的时间记录，即使该用户访问对应项目或活动的权限已被撤销。 具体来说， 在检查“本人时间记录”权限时，未同时验证用户对相关项目和活动的当前团队访问权限；其 逻辑虽然校验了对象可见性，但未验证用户是否仍具有对引用项目和活动的团队访问权限。因此，一条旧的时间记录实际上成为一种持久的“权限凭证”，使攻击者能够在已被撤销权限的项目和活动下创建新的时间记录，从而在管理权限撤销后，污染预

CVSS 5.3 · Medium
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I. Basic Information for CVE-2026-52822

Vulnerability Information
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Vulnerability Title
Kimai: Improper Authorization in Kimai Timesheet Restart and Duplicate Allows New Timesheets After Project Access Revocation
Source: CVE Program / CVE List V5
Vulnerability Description
Kimai is an open-source time tracking application. Prior to 2.58.0, PATCH /api/timesheets/{id}/restart, PATCH /api/timesheets/{id}/duplicate, and the web duplicate workflow can derive a new record from an owned historical timesheet after the user's access to its project or activity has been revoked. TimesheetVoter evaluates the own-timesheet permission before current team access, and its canStart() logic validates object visibility but does not verify the user's current team access to the referenced project and activity. An old entry therefore acts as a persistent capability to create new time records under an unauthorized project and activity, corrupting budgets, statistics, reports, and invoices after an administrative revocation. This issue is fixed in version 2.58.0.
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 < 2.58.0 -

II. Public POCs for CVE-2026-52822

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III. Intelligence Information for CVE-2026-52822

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Patches & Fixes for CVE-2026-52822 (1)

Vendor Advisories for CVE-2026-52822 (2)

Vendor Pages for CVE-2026-52822 (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-2026-52826 5.3 MEDIUM Kimai: Improper Authorization in Kimai Project, Customer, and Activity Rate Edit Endpoints
CVE-2026-52828 5.3 MEDIUM Kimai: ExportTemplate CRUD Missing Authorization Check Allows Unauthorized TEAMLEAD Access

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-52822

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