CVE-2026-33660: n8n Has Multiple Remote Code Execution Vulnerabilities in Merge Node AlaSQL SQL Mode
Impact An authenticated user with permission to create or modify workflows could use the Merge node's "Combine by SQL" mode to read local files on the n8n host and achieve remote code execution. The AlaSQL sandbox did not sufficiently restrict certain SQL statements, allowing an attacker to access sensitive files on the server or even compromise the intance.
Patches The issue has been fixed in n8n versions 2.14.1, 2.13.3, and 1.123.27. Users should upgrade to one of these versions or later to remediate the vulnerability.
Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Limit workflow creation and editing permissions to fully trusted users only. - Disable the Merge node by adding n8n-nodes-base.merge to the NODESEXCLUDE environment variable.
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Other sources
n8n is an open source workflow automation platform. Prior to versions 2.14.1, 2.13.3, and 1.123.26, an authenticated user with permission to create or modify workflows could use the Merge node's "Combine by SQL" mode to read local files on the n8n host and achieve remote code execution. The AlaSQL sandbox did not sufficiently restrict certain SQL statements, allowing an attacker to access sensitive files on the server or even compromise the instance. The issue has been fixed in n8n versions 2.14.1, 2.13.3, and 1.123.26. 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: Limit workflow creation and editing permissions to fully trusted users only, and/or disable the Merge node by adding n8n-nodes-base.merge to the NODESEXCLUDE environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-33660?
CVE-2026-33660 is classified as having multiple remote code execution vulnerabilities, posing high security risks to affected systems.
How do I fix CVE-2026-33660?
To fix CVE-2026-33660, upgrade n8n to versions 2.14.1, 2.13.3, or 1.123.26 or later.
Who is affected by CVE-2026-33660?
CVE-2026-33660 affects n8n users prior to versions 2.14.1, 2.13.3, and 1.123.26 with the Merge node functionality.
What kind of attack can CVE-2026-33660 enable?
CVE-2026-33660 enables authenticated users with specific permissions to execute arbitrary code via the Merge node in SQL mode.
Is authentication required to exploit CVE-2026-33660?
Yes, exploitation of CVE-2026-33660 requires authentication for users with permission to create or modify workflows.