CVE-2026-16442
HIGH
NVD
CVSS Score
7.4
Severity
HIGH
Published
Aug 05, 2026
Vendor
unknown
Description
A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. The issue occurs because the IdP-initiated Single Sign-On endpoint fails to check if a provider is restricted to account linking only. This allows an attacker with control over a linked upstream identity to bypass login restrictions and gain full access to a local user account.