What’s Vulnerable › Vulnerabilities

CVE-2026-80197: Kimai before 2.57.0 Improper Authorization via Favorite Endpoints

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-26 · updated 2026-10-08
• Weakness: CWE-639

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.

Affected products

• kimai: before 2.57.0 — fixed in 2.57.0

How to fix

Upgrade to a fixed version: kimai 2.57.0. Check the vendor advisory for mitigations.

References

• https://github.com/kimai/kimai/security/advisories/GHSA-j5mc-p8qg-39j7
• https://www.vulncheck.com/advisories/kimai-before-2.57.0-improper-authorization-via-favorite-endpoints

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