23 Oct 2026 15:48:27 UTC
Keycloak: keycloak: privilege escalation via time-of-check to time-of-use (toctou) vulnerability
cve-program · CVE-2026-9796 · Published
CVE-2026-9796
Keycloak: keycloak: privilege escalation via time-of-check to time-of-use (toctou) vulnerability
CVSS 3.1 6.5 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-9796
PublishedA 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.
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