Keycloak JWT Bearer Grant Bypass of User Consent
CVE-2026-79652 Published on August 25, 2026
Keycloak-services: keycloak-services: jwt bearer authorization grant does not enforce consentrequired
A flaw was found in the JWT Bearer authorization grant implementation within the keycloak-services component of Red Hat Build of Keycloak. This component handles various OAuth2 and OpenID Connect grant types used for issuing access tokens. The issue occurs because the JWT Bearer grant fails to check if a client requires user consent before issuing a token. This allows an authenticated attacker with valid client credentials and a trusted identity provider assertion to bypass the consent requirement and obtain unauthorized access to a user account at a consent-gated client.
Vulnerability Analysis
CVE-2026-79652 is exploitable with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity, and no impact on availability.
Timeline
Reported to Red Hat.
Made public.
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-79652 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-79652
stack.watch emails you whenever new vulnerabilities are published in Red Hat Build Keycloak or Red Hat Single Sign On. Just hit a watch button to start following.
