Description
A flaw was found in Keycloak. This JWT algorithm confusion vulnerability in the JWT Authorization Grant flow allows an attacker with valid client credentials to bypass signature verification. By forging an assertion, the attacker can create unauthorized access tokens. This enables the attacker to impersonate any federated user linked to the affected Identity Provider, leading to unauthorized access and potential privilege escalation.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Red Hat Red Hat build of Keycloak 26.6
Default version status: affected
26.6.4-2 to < *unaffected
Red Hat Red Hat build of Keycloak 26.6
Default version status: affected
26.6-8 to < *unaffected
Red Hat Red Hat build of Keycloak 26.6
Default version status: affected
26.6-8 to < *unaffected
Red Hat Red Hat build of Keycloak 26.6.4
Default version status: unaffected
Red Hat Red Hat Build of Keycloak
Default version status: affected
Red Hat Red Hat Build of Keycloak
Default version status: unaffected
Red Hat Red Hat Data Grid 8
Default version status: unaffected
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
Default version status: unaffected
Red Hat Red Hat Single Sign-On 7
Default version status: unaffected