# CVE-2026-89043

## Summary

- **CVE ID:** CVE-2026-89043
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (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)
- **CWE:** CWE-347
- **Published:** Sep 10, 2026
- **Last Modified:** 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.

## Affected Products

- krakenjs — passport-saml-encrypted (0)

## References

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

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._