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.

Score
CVSS 3.1 6.5 Medium
Status
Modified - secalert@redhat.com
Published
2026-05-28
Last modified
2026-10-26
Weaknesses
CWE-367

Affected products

References

 
 
© AVABIS GmbH privacypolicy about