CVE-2026-9088: Red Hat Build Of Keycloak 26.4

Low severity, CVSS 2.7. EPSS: 0.5% chance of exploitation in the next 30 days.

A flaw was found in org.keycloak.services. An administrator with delegated access to read group memberships and users can bypass user profile permissions by accessing the group members endpoint. This allows the administrator to view user attributes that are explicitly configured to be denied, leading to information disclosure.

Affected products

• Red Hat Red Hat Build Of Keycloak 26.4: before 26.4.13-1 (fixed in 26.4.13-1); before 26.4-19 (fixed in 26.4-19)
• Red Hat Red Hat Build Of Keycloak 26.4.13
• Red Hat Red Hat Build Of Keycloak 26.6: before 26.6.3-3 (fixed in 26.6.3-3); before 26.6-6 (fixed in 26.6-6)
• Red Hat Red Hat Build Of Keycloak 26.6.3

Published 2026-06-05. Last modified 2026-07-23.