A flaw was found in the Admin REST installation provider endpoints and the Client Registration install endpoint in Keycloak. While the dedicated client-secret endpoint correctly enforces authorization, these specific endpoints fail to mask the client secret when accessed by a user with the realm-management:view-clients role. An authenticated attacker with this role can retrieve the cleartext secret of any confidential client using the client-secret authenticator. Successful exploitation allows the attacker to obtain a client-credentials access token and exercise the target client's service account permissions. This issue represents an incomplete fix for CVE-2026-89298.