What’s Vulnerable › Vulnerabilities

CVE-2026-80196: Kimai before 2.58.0 Authentication Bypass via Password Reset Link

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% 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-640

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.

Affected products

• kimai: before 2.58.0 — fixed in 2.58.0

How to fix

Upgrade to a fixed version: kimai 2.58.0. Check the vendor advisory for mitigations.

References

• https://github.com/kimai/kimai/security/advisories/GHSA-m492-gv72-xvxj
• https://www.vulncheck.com/advisories/kimai-before-2.58.0-authentication-bypass-via-password-reset-link
• https://github.com/kimai/kimai/security/advisories/GHSA-m492-gv72-xvxj

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