What’s Vulnerable › Vulnerabilities

CVE-2026-89043: passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prepending

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-10 · updated 2026-09-10
• Weakness: CWE-347

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.

Affected products

• krakenjs passport-saml-encrypted: through 0.1.13

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
• https://github.com/krakenjs/passport-saml-encrypted/issues/30

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