CVE-2026-89043
critical · 9.1passport-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.
9.1
CVSS
0.3%
EPSS (exploit prob.)
24th
EPSS percentile
2026-09-10
Published
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weaknesses
CWE-347
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
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-89043