Vulnerability in Krakenjs Passport-Saml-Encrypted
CVE-2026-89043
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/krakenjs/passport-saml-encrypted/issues/30 (issue-tracking)
- github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js (technical-description)
- github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js (technical-description)
- github.com/krakenjs/passport-saml-encrypted (product)
- www.vulncheck.com/advisories/passport-saml-encrypted-through-0.1.13-xml-signatu… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-89043?
- CVE-2026-89043 is a high-severity vulnerability in Krakenjs Passport-Saml-Encrypted, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.4/10. Published 2026-09-10.
- How severe is CVE-2026-89043?
- High severity. CVSS v3 base score is 7.4 out of 10.