CVE-2026-80196

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.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-25)

CWE

CWE-640

Published

2026-08-26

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

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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