CVE-2026-89042
CVE-2026-89042
passport-saml-encrypted through 0.1.13 makes SAML signature verification conditional on an optional cert option, allowing attackers to bypass authentication by submitting unsigned SAML responses. Attackers can post forged SAML responses with arbitrary NameID and attributes to the assertion consumer service endpoint to receive authenticated profiles without valid signatures.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Weakness classification (CWE)
References
- github.com/krakenjs/passport-saml-encrypted/issues/29 (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-authenticat… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-89042?
- CVE-2026-89042 is a critical-severity vulnerability, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.1/10. Published 2026-09-10.
- How severe is CVE-2026-89042?
- Critical severity. CVSS v3 base score is 9.1 out of 10.