CVE-2026-80202 Kimai before 2.56.0 Authorization Bypass via TimesheetVoter
Authenticated team leads can read, modify, and delete any user's timesheets system-wide due to missing team membership checks in the API.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-80202?
CVE-2026-80202 is a critical missing authorization vulnerability in kimai, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.)
Weakness: CWE-863
Which versions are affected by CVE-2026-80202?
2 open source packages ship an affected version, including kimai/kimai.
| Package | Affected | Fixed in |
|---|---|---|
kimai/kimai Packagist | All versions | 2.56.0 |
kimai/kimai Packagist | All versions | 2.56.0 |
How do I fix CVE-2026-80202?
Upgrade kimai/kimai to 2.56.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-80202 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-80202 exists.
Sources
Also known as GHSA-9g2q-w3w2-vf7q, GHSA-fx95-9ppf-x8wm.