by Kastro
Paper/Archive/CVE-2026-89043

CVE-2026-89043

krakenjs passport-saml-encrypted — passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prepending

EPSS 0.3%public exploitCVSS 9.1
critical.is priorityof 100
42
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 23.9.239 × 204.8Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
passport-saml-encrypted≤ 0.1.13–CNA

Scores by source

VulnCheck (CNA)9.1CVSS: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 (CNA)7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/krakenjs/passport-saml-encrypted/issues/30writeupgithub.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L256writeupgithub.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L328refgithub.com/krakenjs/passport-saml-encryptedwriteupvulncheck.com/advisories/passport-saml-encrypted-through-0.1.13-xml-signature-wrapping-via-assertion-prepending