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CVE-2026-52823— Kimai: Login CSRF in Kimai Timesheet Stop and Restart API Endpoints Allows Unauthorized State Changes

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， 暴露了 和 两个接口。这两个接口复用已认证的浏览器会话，并通过 GET 请求执行状态变更操作，但缺乏请求伪造（CSRF）防护机制。远程攻击者可以通过攻击者控制的内容，诱导已登录的用户访问上述任一路由，从而在未获得用户同意的情况下停止正在运行的工时记录，或重启历史工时条目并自动创建并启动新的工时记录。这些未经授权的变更可能导致时间记录、账单、报表、审批及审计数据遭到破坏。该问题已在 2.58.0 版本中修复。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-52823

Vulnerability Information
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Vulnerability Title
Kimai: Login CSRF in Kimai Timesheet Stop and Restart API Endpoints Allows Unauthorized State Changes
Source: CVE Program / CVE List V5
Vulnerability Description
Kimai is an open-source time tracking application. Prior to 2.58.0, TimesheetController exposes GET /api/timesheets/{id}/stop and GET /api/timesheets/{id}/restart, which reuse an authenticated browser session and perform state-changing operations through GET requests without a request-forgery defense. A remote attacker can cause a logged-in user to request either route from attacker-controlled content, stopping a running timesheet or restarting a historical entry to create and start a new timesheet without the user's consent. The unauthorized changes can corrupt time records, billing, reports, approvals, and audits. 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
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kimai kimai < 2.58.0 -

II. Public POCs for CVE-2026-52823

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III. Intelligence Information for CVE-2026-52823

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Patches & Fixes for CVE-2026-52823 (1)

Vendor Pages for CVE-2026-52823 (1)

Other References for CVE-2026-52823 (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-2026-52821 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
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-352

V. Comments for CVE-2026-52823

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