dev.to· Oct 3, 2026· by axrisi

How SAML works, and why XML signature wrapping keeps breaking it

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How SAML works: the identity provider signs an XML assertion and hides the signature inside it. That is why XML signature wrapping bugs keep coming back.
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.
#security#authentication#saml#sso