4.9
Medium
CVE-2026-0871 A flaw was found in Keycloak
Description
A flaw was found in Keycloak. An administrator with `manage-users` permission can bypass the "Only administrators can view" setting for unmanaged attributes, allowing them to modify these attributes. This improper access control can lead to unauthorized changes to user profiles, even when the system is configured to restrict such modifications.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat build of Keycloak 26.4 26.4 | earliest → < 26.4-10 | 26.4-10 |
| Red Hat build of Keycloak 26.4.9 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Versions not published | |
| Red Hat Single Sign-On 7 | Versions not published |
Other CVEs of Red Hat build of Keycloak 26.4
The 116 CVEs of Red Hat build of Keycloak 26.4 →
CVE-2026-97848
Keycloak-services: keycloak-services: protocol mapper with jsontype=json bypasses token sanitization
6.5
Medium
CVE-2026-97367
Keycloak-services: keycloak-services: dcr azp and sid claim substitution allows account rest session takeover
6.4
Medium
CVE-2026-96547
Keycloak-services: keycloak-services: dcr registration-time claim-path gap allows forging realm_access.roles
6.5
Medium
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
High