CVE-2026-89043
passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prepending
- State
- Published
- Severity
- 9.1 Critical
- Published
- Sep 10, 2026
- Updated
- Sep 10, 2026
- Reserved
- Sep 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.1 Critical | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-347 Improper Verification of Cryptographic Signature
Affected Products
| Product | Versions |
|---|---|
passport-saml-encryptedkrakenjs |
|
References
- Reporter advisory: XML signature wrappingissue-tracking
- Signature located by an unconstrained XPath at v0.1.13technical-description
- Assertion selected by a separate first-match XPath at v0.1.13technical-description
- krakenjs/passport-saml-encryptedproduct
- VulnCheck Advisory: passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prependingthird-party-advisory
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