6.5
Medium
CVE-2026-9796 A flaw was found in Keycloak
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Build of Keycloak | Versions not published | |
| Red Hat build of Keycloak 26.6 26.6 | earliest → < 26.6-12 | 26.6-12 |
| Red Hat build of Keycloak 26.6.6 | Versions not published |
References
- RHSA-2026:56523 access.redhat.com
- RHSA-2026:56524 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2482464 bugzilla.redhat.com
Timeline
- Published
- Last modified
Other CVEs of Red Hat Build of Keycloak
The 266 CVEs of Red Hat Build of Keycloak →
CVE-2026-97847
Keycloak-services: keycloak-services: client manager can substitute sessionless token principal via hardcoded-claim mappers to obtain realm administrator authority
7.1
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CVE-2026-97175
Keycloak-services: keycloak-services: unverified idp email auto-linking enables account takeover
8.8
High
CVE-2026-97174
Keycloak-services: keycloak-services: ciba sub parameter injection causes attacker authentication to issue victim tokens
6.8
Medium
CVE-2026-96453
Org.keycloak/keycloak-admin-cli: keycloak-admin-cli: kcadm custom truststore accepts arbitrary self-signed certificates
8.0
High