Unverified50% confidenceEventExact time
There are four SAML authentication bypass vulnerabilities, whose common root cause is that the same SAML response is interpreted as different content by different parsers or expressions in the signature verification and identity extraction steps.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/14/2026
First Seen
Valid until: 1/12/2027
Sources
Related Entities
Related Claims
UnverifiedThe core approach to reducing SAML risk is to isolate SAML processing, avoiding hand-written XML parsing and signature verification logic, and instead using audited mature libraries or dedicated identity gateways.77% similarUnverifiedThis class of SAML flaws is usually categorized at the intersection of CWE-436 (Interpretation Conflict) and CWE-347 (Improper Verification of Cryptographic Signature).69% similarUnverifiedSimilar historical cases include the Duo Labs SAML vulnerabilities disclosed in 2018 (involving XML comments and namespace confusion), the GitHub Enterprise SAML bypass, and the earlier XML Signature Wrapping (XSW) attack.66% similarUnverifiedSAML is built on top of XML and relies heavily on XML Digital Signatures (XML DSig) and XML Encryption.63% similarUnverifiedFor JWT signing algorithms, HS256 or RS256 must be explicitly specified, and tokens with alg: none must be rejected, otherwise algorithm confusion attacks will occur.59% similar
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