CVE-2026-9088: Keycloak: keycloak: information disclosure due to user profile permission bypass

Severity: low (CVSS 2.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-05 · updated 2026-07-23
Weakness: CWE-1220

Description

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 build of Keycloak 26.4: all versions — fixed in 26.4-19, 26.4.13-1, 26.6-6, 26.6.3-3

How to fix

Upgrade to a fixed version: Red Hat build of Keycloak 26.4 26.4-19, 26.4.13-1, 26.6-6, 26.6.3-3. Check the vendor advisory for mitigations.

References

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