{"id":"CVE-2026-52823","aliases":["EUVD-2026-78404","GHSA-r8vr-m544-qh4h"],"status":"published","title":"Kimai: Login CSRF in Kimai Timesheet Stop and Restart API Endpoints Allows Unauthorized State Changes","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.","severity":{"version":"4.0","score":5.3,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00298,"percentile":0.22615,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-352"],"published":"2026-07-14T00:05:04Z","modified":"2026-10-28T02:31:14Z","fixes":[{"ecosystem":"Packagist","package":"kimai/kimai","fixed_in":["2.58.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"kimai/kimai","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.57.0"},{"fixed":"2.58.0"}]}]},{"source":"osv","ecosystem":"Packagist","package":"kimai/kimai","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.58.0"}]}],"versions":["0.1","0.2","0.3","0.4","0.5","0.6","0.6.1","0.7","0.8","0.8.1","0.9","1.0","1.0.1","1.1","1.10","1.10.1","1.10.2","1.11","1.11.1","1.12","1.13","1.14","1.14.1","1.14.2","1.14.3","1.15","1.15.1","1.15.2","1.15.3","1.15.4","1.15.5","1.15.6","1.16","1.16.1","1.16.10","1.16.2","1.16.3","1.16.4","1.16.5","1.16.6","1.16.7","1.16.8","1.16.9","1.17","1.17.1","1.18","1.18.1","1.18.2","1.19","1.19.1","1.19.2","1.19.3","1.19.4","1.19.5","1.19.6","1.19.7","1.2","1.20","1.20.1","1.20.2","1.20.3","1.20.4","1.21.0","1.22.0","1.22.1","1.23.0","1.23.1","1.24.0","1.25.0","1.26.0","1.27.0","1.28.0","1.28.1","1.29.0","1.29.1","1.3","1.30.0","1.30.1","1.30.10","1.30.11","1.30.2","1.30.3","1.30.4","1.30.5","1.30.6","1.30.7","1.30.8","1.30.9","1.4","1.4.1","1.4.2","1.5","1.6","1.6.1","1.6.2","1.7","1.8","1.9","2.0.0","2.0.0-alpha","2.0.0-beta","2.0.0-beta-2","2.0.0-beta-3","2.0.0-rc-1","2.0.1","2.0.10","2.0.11","2.0.12","2.0.13","2.0.14","2.0.15","2.0.16","2.0.17","2.0.18","2.0.19","2.0.2","2.0.20","2.0.21","2.0.22","2.0.23","2.0.24","2.0.25","2.0.26","2.0.27","2.0.28","2.0.29","2.0.3","2.0.30","2.0.31","2.0.32","2.0.33","2.0.34","2.0.35","2.0.4","2.0.5","2.0.6","2.0.7","2.0.8","2.0.9","2.1.0","2.10.0","2.11.0","2.12.0","2.13.0","2.14.0","2.15.0","2.16.0","2.16.1","2.17.0","2.18.0","2.19.0","2.19.1","2.2.0","2.2.1","2.20.0","2.20.1","2.21.0","2.22.0","2.23.0","2.24.0","2.25.0","2.26.0","2.27.0","2.28.0","2.29.0","2.3.0","2.30.0","2.31.0","2.32.0","2.33.0","2.34.0","2.35.0","2.35.1","2.36.0","2.36.1","2.37.0","2.38.0","2.39.0","2.4.0","2.4.1","2.40.0","2.41.0","2.42.0","2.43.0","2.44.0","2.45.0","2.46.0","2.47.0","2.48.0","2.49.0","2.5.0","2.50.0","2.51.0","2.52.0","2.53.0","2.54.0","2.55.0","2.56.0","2.57.0","2.6.0","2.7.0","2.8.0","2.9.0"]}],"products":[{"vendor":"kimai","product":"kimai"}],"references":[{"url":"https://github.com/kimai/kimai/security/advisories/GHSA-r8vr-m544-qh4h","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/kimai/kimai/pull/5952","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/kimai/kimai/commit/31a8f887a5cda517db7b4320a7ad997c87d08601","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/kimai/kimai/releases/tag/2.58.0","tags":["x_refsource_MISC","web"]},{"url":"https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/advisories/GHSA-r8vr-m544-qh4h"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52823.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52823","tags":["advisory"]},{"url":"https://github.com/kimai/kimai","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-52823","title":"Kimai: Login CSRF in Kimai Timesheet Stop and Restart API Endpoints Allows Unauthorized State Changes","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.","status":"published","published":"2026-09-15T10:41:17.84Z","modified":"2026-09-15T13:52:24.796Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium","assessor":"cna"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T13:40:57.334596Z"}],"euvd":[{"id":"EUVD-2026-78404","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.","status":"published","published":"2026-09-15T10:41:17Z","modified":"2026-09-15T13:52:24Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"updated_at":"2026-11-02T17:28:18.438671Z"}],"ghsa":[{"id":"GHSA-r8vr-m544-qh4h","title":"Kimai: Login CSRF in the Timesheet Stop and Restart API Endpoints Allows Unauthorized State Changes","description":"### Summary\n\nKimai 2.56.0 contains authenticated cross-site request forgery issues in its timesheet state-changing API endpoints. The application reuses the browser's existing session for `/api/*` requests, and both the `stop` and `restart` operations are exposed through `GET` and `PATCH` routes that directly modify business state.\n\nAs a result, an attacker can trick a logged-in user into visiting a malicious page and cause unauthorized timesheet actions without the victim's consent. Depending on the endpoint, this can stop a running timesheet or create and start a new one from historical data.\n\n### Details\n\nThe issue affects at least the following API routes:\n\n- `GET /api/timesheets/{id}/stop`\n- `GET /api/timesheets/{id}/restart`\n\nBoth routes are non-read-only operations but are still exposed as `GET`. In `src/API/TimesheetController.php`.\n\n*A PoC was provided, but removed for security reasons.*\n\n### Impact\n\nThis vulnerability allows an attacker to trigger unauthorized business-state changes as a logged-in victim. In the validated `stop` case, a running timesheet can be stopped, affecting time tracking integrity and potentially availability of ongoing work tracking. In the `restart` case, a historical timesheet can be restarted and a new record can be created without the victim's knowledge.\n\nThese actions can corrupt time records, distort billing and reporting, interfere with approvals or audits, and create persistent database-side side effects. Because exploitation requires only that the victim visit a malicious page while authenticated, the attack barrier is low.\n\n# Solution\n\nThe `GET` routes were removed, both `stop` and `restart` are only available via `PATCH`.\n\nSee [https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h](https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h) for more information.","status":"published","published":"2026-07-14T00:05:04Z","modified":"2026-07-14T00:05:05Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:40:42.703776Z"}],"nvd":[{"id":"CVE-2026-52823","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.","status":"published","published":"2026-09-15T11:17:09.4Z","modified":"2026-09-23T18:22:16.503Z","cvss":[{"version":"4.0","score":5.3,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:12:47.335523Z"}],"osv":[{"id":"CVE-2026-52823","title":"Kimai: Login CSRF in Kimai Timesheet Stop and Restart API Endpoints Allows Unauthorized State Changes","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.","status":"published","published":"2026-09-15T10:41:17.84Z","modified":"2026-10-28T02:31:14.238435434Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T15:45:07.431113Z"},{"id":"GHSA-r8vr-m544-qh4h","title":"Kimai: Login CSRF in the Timesheet Stop and Restart API Endpoints Allows Unauthorized State Changes","description":"### Summary\n\nKimai 2.56.0 contains authenticated cross-site request forgery issues in its timesheet state-changing API endpoints. The application reuses the browser's existing session for `/api/*` requests, and both the `stop` and `restart` operations are exposed through `GET` and `PATCH` routes that directly modify business state.\n\nAs a result, an attacker can trick a logged-in user into visiting a malicious page and cause unauthorized timesheet actions without the victim's consent. Depending on the endpoint, this can stop a running timesheet or create and start a new one from historical data.\n\n### Details\n\nThe issue affects at least the following API routes:\n\n- `GET /api/timesheets/{id}/stop`\n- `GET /api/timesheets/{id}/restart`\n\nBoth routes are non-read-only operations but are still exposed as `GET`. In `src/API/TimesheetController.php`.\n\n*A PoC was provided, but removed for security reasons.*\n\n### Impact\n\nThis vulnerability allows an attacker to trigger unauthorized business-state changes as a logged-in victim. In the validated `stop` case, a running timesheet can be stopped, affecting time tracking integrity and potentially availability of ongoing work tracking. In the `restart` case, a historical timesheet can be restarted and a new record can be created without the victim's knowledge.\n\nThese actions can corrupt time records, distort billing and reporting, interfere with approvals or audits, and create persistent database-side side effects. Because exploitation requires only that the victim visit a malicious page while authenticated, the attack barrier is low.\n\n# Solution\n\nThe `GET` routes were removed, both `stop` and `restart` are only available via `PATCH`.\n\nSee [https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h](https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h) for more information.","status":"published","published":"2026-07-14T00:05:04Z","modified":"2026-07-14T00:26:47.112612Z","cvss":[{"version":"4.0","score":5.3,"vector":"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","level":"medium"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T15:46:55.480549Z"}]}}