Vulnerability Details CVE-2026-9796
A flaw was found in Keycloak. An authenticated administrator with the `manage-clients` role can exploit a Time-of-check to time-of-use (TOCTOU) vulnerability in the name-based admin role checks. This allows the attacker to escalate their privileges to `realm-admin` for all users within the realm, granting them extensive control over the system. The composite role relationship persists even after the attacker's own permissions are revoked and across system reboots.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 8.0%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-9796
-
cpe:2.3:a:redhat:build_of_keycloak:-