CVE-2026-9705
Description
A flaw was found in Keycloak's client registration service. A remote attacker, possessing a previously issued Registration Access Token (RAT), could exploit this vulnerability to re-enable a client that an administrator had explicitly disabled. This bypasses security controls, allowing the attacker to reset the client's secret and potentially regain privileged API access. The primary impact includes unauthorized information disclosure and potential integrity compromise.
Summary dbcve.org
A logic flaw in Keycloak's client registration service allows an attacker with a previously issued Registration Access Token (RAT) to bypass admin-disablement of a client and re-enable it. This enables the attacker to reset the client's secret and regain privileged API access, resulting in unauthorized information disclosure and potential integrity compromise.
Mitigation
Apply the vendor patch for CVE-2026-9705 when available; in the interim, revoke all active RATs for disabled clients and monitor client state changes for suspicious re-enablement activity.