CVE-2026-118030
CVE-2026-118030 · Keycloak-services: keycloak-services: hotp race condition allows single otp code reuse across concurrent logins
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 4.2 · Medium · EPSS 0.2%
- Published
- Updated
Affected products and versions
red hat build of keycloak
No fix published
red hat single sign-on 7
No fix published