8.8 High

CVE-2026-97175 Keycloak-services: keycloak-services: unverified idp email auto-linking enables account takeover

Description

A flaw was found in the idp-auto-link authenticator of the keycloak-services component, which handles user identity federation. The issue occurs when Keycloak automatically links an incoming identity from an external provider to an existing local account based on an email address without verifying if the provider has validated that email. This can allow an attacker to take over a victim's account by using a matching unverified email address at a brokered provider.

CVSS 3.1 detail

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: Low
Privileges required: Low
Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Build of Keycloak	Versions not published
Red Hat Single Sign-On 7	Versions not published

References

access.redhat.com access.redhat.com

Timeline

Published November 5, 2026
Last modified November 5, 2026

The 266 CVEs of Red Hat Build of Keycloak →

CVE-2026-97847 Keycloak-services: keycloak-services: client manager can substitute sessionless token principal via hardcoded-claim mappers to obtain realm administrator authority 7.1 High CVE-2026-97174 Keycloak-services: keycloak-services: ciba sub parameter injection causes attacker authentication to issue victim tokens 6.8 Medium CVE-2026-96453 Org.keycloak/keycloak-admin-cli: keycloak-admin-cli: kcadm custom truststore accepts arbitrary self-signed certificates 8.0 High CVE-2026-93998 Keycloak-core: keycloak-core: saml adapter does not bind signed assertions to the configured identity provider issuer 7.4 High

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