🛡️ GHSA-8342-988q-86cr — n8n

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-345 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

n8n: Account Takeover via Unverified Email Claim in Token Exchange Embed Login

Impact

In an n8n instance, when a validly-signed incoming token was matched to a local account by its email claim, the service did not check that the trusted key's permitted role ceiling covered that account, nor that the email claim was verified. As a result, anyone able to obtain a token accepted by one of the configured trusted keys, for example a trusted issuer that emitted unverified email addresses, could authenticate as any existing user, gaining full account control.

This issue only affects instances where the embed login feature is enabled and at least one trusted key source is configured.

Patches

The issue has been fixed in n8n version 2.32.1. Users should upgrade to this version or later to remediate the vulnerability.

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

  • Disable the embed login feature by setting N8N_TOKEN_EXCHANGE_ENABLED=false.
  • If embed login cannot be disabled, restrict network access to the n8n instance to fully trusted parties only, and audit all configured trusted keys and their allowedRoles assignments.
  • Review auth_identity records for unexpected token-exchange entries linked to high-privilege accounts.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

GHSA-8342-988q-86cr is classified as CWE-345: Insufficient Verification of Data Authenticity. Data is trusted without confirming it really came from the claimed source and was not altered.

Affected software

GHSA-8342-988q-86cr is recorded against 1 package.

  • n8n

Timeline and source

Published on 22 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)
github.com (Web)

Details

Severity HIGH
CVSS Score 8.0
CVSS 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
CWE CWE-345
Public Exploit ✅ No
Source OSV
Published 2026-07-22
Updated 2026-08-12
Modified 2026-07-22
Fix URL N/A

Affected Packages

Software From version Fixed in
n8n — —

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