Is this vulnerability remotely exploitable?

Yes. Any user who can reach the n8n login interface and authenticate via LDAP with valid credentials can potentially exploit it, provided they can control their LDAP email attribute.

What level of access does an attacker need to exploit this?

The attacker needs: - Valid LDAP credentials for some account in the directory, and - The ability to modify the email attribute of that LDAP account. No prior access to n8n itself is required beyond the LDAP login capability.

What is the safest general fix pattern?

The safest pattern is to redesign the identity-linking mechanism so that: - It uses immutable, non-user-editable identifiers from the identity provider (e.g., unique directory IDs). - It does not automatically bind external identities to existing local accounts based solely on email or other mutable attributes. - Any new link between an external identity and a local account is explicitly validated.

Severity:

HIGH RISK

(7.5)

Improper Authentication Linking (CWE-287) in n8n LDAP Account Association

CVE-2026-33665

Published:

Mar 25, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Improper Authentication

CWE:

CWE-287

Impact:

Account Takeover and Privilege Escalation

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Authentication

CWE:

CWE-287

Impact:

Account Takeover and Privilege Escalation

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Improper Authentication Linking (CWE-287) in n8n LDAP Account Association

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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