CVE-2026-14781 Keycloak-services: keycloak-services: oidc email_verified claim incorrectly applied to userinfo email
Attackers can mark arbitrary emails as verified by exploiting OIDC broker logic, potentially leading to account takeover if email verification is trusted.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-14781?
CVE-2026-14781 is a medium-severity vulnerability in Redhat Build of Keycloak, published on 5 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw exists in the org.keycloak.broker.oidc package where the OIDC broker incorrectly synchronizes the email_verified claim. When an OIDC identity provider is configured with trustEmail=true and the userinfo endpoint is enabled, Keycloak retrieves the email address from the userinfo response but retrieves the email_verified status exclusively from the id_token. The root cause is a lack of validation ensuring that the email_verified claim in the id_token actually refers to the email address returned by the userinfo endpoint. If these two sources return different email addresses, the id_token's email_verified=true claim is blindly applied to the userinfo email. Exploitation Conditions: The OIDC identity provider must have trustEmail set to true (non-default).
The userinfo endpoint must be enabled (default).
The attacker must control or have compromised the upstream OIDC provider.
Concrete Impact: Mark arbitrary email addresses as verified in the Keycloak database.
Bypass email-based security controls or verification workflows.
Potential account takeover if the application relies solely on the email_verified flag from the IdP to link accounts.
Weakness: CWE-1288
Which versions are affected by CVE-2026-14781?
It affects 1 product.
Products include Redhat Build of Keycloak.
How do I fix CVE-2026-14781?
No fix has been published for CVE-2026-14781 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-14781 being exploited?
There is no known exploitation of CVE-2026-14781 in the wild and no public exploit code.
Other vulnerabilities in Redhat Build of Keycloak
- CVE-2026-15572 Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation
- CVE-2026-3047 Keycloak SAML Broken has Authentication Bypass by Primary Weakness
- CVE-2026-15573 Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
- CVE-2026-16102 Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
- CVE-2026-1609 Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users
Sources
Also known as GHSA-c96p-56gh-3pvw.