CVE-2026-118030
MEDIUM
NVD
CVSS Score
4.2
Severity
MEDIUM
Published
Oct 29, 2026
Vendor
unknown
Description
A flaw was found in the HOTP authentication mechanism of the keycloak-services component, which provides identity and access management services. The issue occurs because the system validates a one-time password and updates its internal counter in two separate steps without proper locking. An attacker with a users password could exploit this timing gap to use a single one-time code to log in multiple times simultaneously.