CVE-2026-80197 Kimai before 2.57.0 Improper Authorization via Favorite Endpoints
Authenticated users can manipulate other users' favorite timesheet lists by referencing identifiers, allowing cross-user data tampering.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-80197?
CVE-2026-80197 is a high-severity missing authorization vulnerability in kimai, published on 25 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Kimai before 2.57.0 contains an improper authorization vulnerability in the favorite timesheet add and remove endpoints that allows authenticated users to manipulate other users' bookmarks. Attackers can add or remove timesheet entries from another user's favorite list by referencing their timesheet identifier, enabling cross-user business-state tampering without administrative privileges.
Weakness: CWE-639
Which versions are affected by CVE-2026-80197?
2 open source packages ship an affected version, including kimai/kimai.
| Package | Affected | Fixed in |
|---|---|---|
kimai/kimai Packagist | All versions | 2.57.0 |
kimai/kimai Packagist | All versions | 2.57.0 |
How do I fix CVE-2026-80197?
Upgrade kimai/kimai to 2.57.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-80197 being exploited?
There is no known exploitation of CVE-2026-80197 in the wild and no public exploit code.
Sources
Also known as GHSA-h76h-mxwq-v9xp, GHSA-j5mc-p8qg-39j7.