CVE-2026-80197

Medium

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.

SeverityMedium

CVSS4.3

Exploit probability—

ProductKimai/kimai

PublishedAug 26, 2026

First seenAug 26, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

kimai/kimai2.57.0 or later

Vendor advisories

github.com/kimai/kimai/security/advisories/GHSA-j5mc-p8qg-39j7

Affected products

Product	Affected versions	Fixed in
kimai/kimaiPackagist	v < 2.57.0	2.57.0

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