CVE-2026-33665

n8n is an open source workflow automation platform. Prior to versions 2.4.0 and 1.121.0, when LDAP authentication is enabled, n8n automatically linked an LDAP identity to an existing local account if the LDAP email attribute matched the local account's email. An authenticated LDAP user who could control their own LDAP email attribute could set it to match another user's email — including an administrator's — and upon login gain full access to that account. The account linkage persisted even if the LDAP email was later reverted, resulting in a permanent account takeover. LDAP authentication must be configured and active (non-default). The issue has been fixed in n8n versions 2.4.0 and 1.121.0. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Disable LDAP authentication until the instance can be upgraded, restrict LDAP directory permissions so that users cannot modify their own email attributes, and/or audit existing LDAP-linked accounts for unexpected account associations. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

• CWE-287

• https://github.com/n8n-io/n8n/security/advisories/GHSA-c545-x2rh-82fcMitigation, Vendor Advisory

Published

Mar 25, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-3366IBM InfoSphere Optim Test Data Fabrication 1.0.0, 1.0.0.1, 1…7.5
• CVE-2026-33660n8n is an open source workflow automation platform. Prior to…8.8
• CVE-2026-33661Pay is an open-source payment SDK extension package for vari…7.5
• CVE-2026-33662OP-TEE is a Trusted Execution Environment (TEE) designed as …7.5
• CVE-2026-33663n8n is an open source workflow automation platform. Prior to…6.5
• CVE-2026-33664Kestra is an open-source, event-driven orchestration platfor…5.4
• CVE-2026-33666Zserio is a framework for serializing structured data with a…7.5
• CVE-2026-33667OpenProject is an open-source project management application…7.4
• CVE-2026-33668Vikunja is an open-source self-hosted task management platfo…8.1
• CVE-2026-33669SiYuan is a personal knowledge management system. Prior to v…7.5
• CVE-2026-3367The Lockme OAuth2 calendars integration plugin for WordPress…4.4
• CVE-2026-33670SiYuan is a personal knowledge management system. Prior to v…7.5