CVE-2026-25056: n8n Arbitrary File Write leading to RCE in n8n Merge Node
Impact
A vulnerability in the Merge node's SQL Query mode allowed authenticated users with permission to create or modify workflows to write arbitrary files to the n8n server's filesystem potentially leading to remote code execution.
Patches
The issue has been fixed in n8n version 2.4.0, 1.118.0. 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:
- Limit workflow creation and editing permissions to fully trusted users only. - Disable or restrict use of the Merge node if not essential for operations. - Review workflows for suspicious use of the Merge node's SQL Query mode.
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Resources
- n8n Documentation — Blocking nodes — how to globally disable specific nodes
--- n8n has adopted CVSS 4.0 as primary score for all security advisories. CVSS 3.1 vector strings are provided for backwards compatibility.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Other sources
n8n is an open source workflow automation platform. Prior to versions 1.118.0 and 2.4.0, a vulnerability in the Merge node's SQL Query mode allowed authenticated users with permission to create or modify workflows to write arbitrary files to the n8n server's filesystem potentially leading to remote code execution. This issue has been patched in versions 1.118.0 and 2.4.0.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-25056?
CVE-2026-25056 is classified as a critical vulnerability due to its potential to allow remote code execution.
How do I fix CVE-2026-25056?
To remediate CVE-2026-25056, upgrade to n8n version 2.4.0 or later.
Who is affected by CVE-2026-25056?
CVE-2026-25056 affects n8n versions prior to 2.4.0 and 1.118.0.
What could happen if CVE-2026-25056 is exploited?
Exploitation of CVE-2026-25056 could allow attackers to write arbitrary files on the n8n server, potentially leading to remote code execution.
What functionalities are impacted by CVE-2026-25056?
CVE-2026-25056 impacts the Merge node's SQL Query mode, which can be exploited by authenticated users to compromise the server's filesystem.