CVE-2026-80196

High

Description

Kimai before 2.58.0 contains an authentication bypass vulnerability where password reset links remain valid after password changes because the LoginLink signature covers only the user id, not the password hash. Attackers who intercept or cache a password reset link can use it up to 2 additional times within a 1-hour window to log in as the user even after the legitimate user has changed their password.

SeverityHigh

CVSS7.5

Exploit probability41. percentile0.5%

ProductKimai/kimai

PublishedAug 26, 2026

First seenAug 26, 2026

Weakness typeCWE-640CWE-640

How to fix

Update

kimai/kimai2.58.0 or later

Vendor advisories

github.com/kimai/kimai/security/advisories/GHSA-m492-gv72-xvxj

Affected products

Product	Affected versions	Fixed in
kimai/kimaiPackagist	v < 2.58.0	2.58.0

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