CVE-2026-27498: n8n has Arbitrary Command Execution via File Write and Git Operations
Impact An authenticated user with permission to create or modify workflows could chain the Read/Write Files from Disk node with git operations to achieve remote code execution. By writing to specific configuration files and then triggering a git operation, the attacker could execute arbitrary shell commands on the n8n host.
Patches The issue has been fixed in n8n versions 2.2.0 and 1.123.8. 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 Read/Write Files from Disk node by adding n8n-nodes-base.readWriteFile 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 2.2.0 and 1.123.8, an authenticated user with permission to create or modify workflows could chain the Read/Write Files from Disk node with git operations to achieve remote code execution. By writing to specific configuration files and then triggering a git operation, the attacker could execute arbitrary shell commands on the n8n host. The issue has been fixed in n8n versions 2.2.0 and 1.123.8. 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 Read/Write Files from Disk node by adding n8n-nodes-base.readWriteFile to the NODESEXCLUDE environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
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Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-27498?
CVE-2026-27498 has a high severity due to the potential for arbitrary command execution through user permissions.
How do I fix CVE-2026-27498?
To mitigate CVE-2026-27498, upgrade n8n to version 2.2.0 or above, or to version 1.123.8 or below.
Who is affected by CVE-2026-27498?
CVE-2026-27498 affects authenticated users of n8n with permissions to create or modify workflows.
What are the risks of CVE-2026-27498?
The risks associated with CVE-2026-27498 include the potential for remote code execution, compromising the system.
How can I verify if my n8n instance is vulnerable to CVE-2026-27498?
You can verify if your n8n instance is vulnerable to CVE-2026-27498 by checking if it runs between versions 2.0.0 and 2.2.0 or below version 1.123.8.