CVE-2026-89043CWE-347

CVE-2026-89043

High · published September 10, 2026

CVSS v3.1
7.4
EPSS
0%
Percentile
22.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
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
EPSS
0.00310 · 22.6th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2026-09-10T22:18Z
References (6)
https://github.com/krakenjs/passport-saml-encrypted · [email protected]https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L256 · [email protected]https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L328 · [email protected]https://github.com/krakenjs/passport-saml-encrypted/issues/30 · [email protected]https://www.vulncheck.com/advisories/passport-saml-encrypted-through-0.1.13-xml-signature-wrapping-via-assertion-prepending · [email protected]https://github.com/krakenjs/passport-saml-encrypted/issues/30 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 12 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 10 SEP 17:39Z
    passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prepending
    cvelistv5