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Vulnerability record · CVE-2026-80202 · published 26 August 2026

CVE-2026-80202: Incorrect authorization vulnerability

Kimai before 2.56.0 does not enforce team-membership checks in TimesheetVoter::voteOnAttribute(), which maps permissions only to own_timesheet or other_timesheet. As a result, any authenticated user with ROLE_TEAMLEAD (or a role holding edit_other_timesheet/delete_other_timesheet) can read, modify, and permanently delete timesheets belonging to any user system-wide via the API, regardless of team membership. Timesheet IDs are sequential integers and trivially enumerable. ROLE_USER accounts are correctly restricted. (Note: the maintainers characterize this behavior as matching the documented permission model.)

9.3 CVSS 4.0 Critical EPSS 0.45% · top 63.7% CWE-863 · Incorrect authorization Deferred
9.3CVSS 4.0 base score
0.45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
3 Sep 2026Last modified by NVD

Description

Kimai before 2.56.0 does not enforce team-membership checks in TimesheetVoter::voteOnAttribute(), which maps permissions only to own_timesheet or other_timesheet. As a result, any authenticated user with ROLE_TEAMLEAD (or a role holding edit_other_timesheet/delete_other_timesheet) can read, modify, and permanently delete timesheets belonging to any user system-wide via the API, regardless of team membership. Timesheet IDs are sequential integers and trivially enumerable. ROLE_USER accounts are correctly restricted. (Note: the maintainers characterize this behavior as matching the documented permission model.)

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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:

References

LinkTags
https://github.com/kimai/kimai/security/advisories/GHSA-9g2q-w3w2-vf7q
https://www.vulncheck.com/advisories/kimai-before-2.56.0-authorization-bypass-via-timesheetvoter
https://github.com/kimai/kimai/security/advisories/GHSA-9g2q-w3w2-vf7q

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Source: NIST National Vulnerability Database (record CVE-2026-80202), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.