Description
A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC client. By tricking a user into authenticating, an attacker-controlled client can forge a valid linking URL to connect the victim's account to an attacker's external identity. This results in a full account takeover, allowing the attacker to log in as the victim.
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
26.6.6-1 to < *unaffected
Red Hat Red Hat build of Keycloak 26.6
Default version status: affected
26.6-12 to < *unaffected
Red Hat Red Hat build of Keycloak 26.6
Default version status: affected
26.6-12 to < *unaffected
Red Hat Red Hat build of Keycloak 26.6.6
Default version status: unaffected
Red Hat Red Hat build of Keycloak 26.6.6
Default version status: unaffected
Red Hat Red Hat build of Keycloak 26.6.6
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