CVE-2026-89043

Description

passport-saml-encrypted through 0.1.13 contains an XML signature wrapping vulnerability where signature verification and assertion extraction use independent XPath lookups with no cross-validation. Attackers holding any validly signed SAML message can prepend a forged unsigned assertion that gets accepted as the verified identity while the genuine signature validates against the original assertion.

References

• https://github.com/krakenjs/passport-saml-encrypted
• https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L256
• https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L328
• https://github.com/krakenjs/passport-saml-encrypted/issues/30
• https://www.vulncheck.com/advisories/passport-saml-encrypted-through-0.1.13-xml-signature-wrapping-via-assertion-prepending