User Impersonation Affecting n8n package, versions <1.121.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-N8N-15837400
- published31 Mar 2026
- disclosed25 Mar 2026
- creditweblover12, 34selen, b0r1, Jeon-Ji-Hwan
Introduced: 25 Mar 2026
NewCVE-2026-33665 (opens in a new tab)How to fix?
Upgrade n8n to version 1.121.0 or higher.
Overview
n8n is a n8n Workflow Automation Tool
Affected versions of this package are vulnerable to User Impersonation in the account linking when LDAP authentication is enabled. An attacker can gain unauthorized access to another user's account, including administrative accounts, by setting their LDAP email attribute to match the target user's email. This linkage persists even if the LDAP email is later changed, resulting in permanent unauthorized access.
Workaround
This vulnerability can be mitigated by disabling LDAP authentication, restricting LDAP directory permissions to prevent users from modifying their own email attributes, or auditing existing LDAP-linked accounts for unexpected associations.