SAML Trust Abuse Attacks Explained (2026): How Identity Federation Can Become an Enterprise Attack Surface
How Attackers Abuse SAML Trust Relationships in Enterprise SSO SAML Trust Abuse Attacks Explained (2026) Enterprise applications increasingly depend on centralized identity systems. Instead of maintaining separate usernames and passwords for every application, organizations use identity federation to allow employees to authenticate through a trusted Identity Provider (IdP). One of the technologies commonly used to enable this model is SAML , or Security Assertion Markup Language. SAML can make enterprise authentication simpler and more manageable. However, the same trust relationships that make federation powerful can also create a significant security boundary. If that trust is incorrectly configured, poorly monitored, or abused by an attacker, a compromise of one identity component can potentially affect multiple connected applications. This creates an important cybersecurity question: What happens when the trust relationship designed to simplify enterprise authentication becomes th...