CVE-2026-44791: n8n: XML Node Prototype Pollution Patch Bypass
Impact An authenticated user with permission to create or modify workflows could bypass the patch for GHSA-hqr4-h3xv-9m3r in the XML node. When combined with other nodes, this could lead to RCE on the n8n host.
Patches The issue has been fixed in n8n versions 1.123.43, 2.20.7, and 2.22.1. 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 XML node by adding n8n-nodes-base.xml to the NODESEXCLUDE environment variable.
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
--- 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 1.123.43, 2.22.1, and 2.20.7, an authenticated user with permission to create or modify workflows could bypass the patch for CVE-2026-42232 in the XML node. When combined with other nodes, this could lead to RCE on the n8n host. This vulnerability is fixed in 1.123.43, 2.22.1, and 2.20.7.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
npm/n8nto a version that resolves this vulnerability.Fixed in 2.20.7 - Upgrade
Upgrade
npm/n8nto a version that resolves this vulnerability.Fixed in 2.22.1 - Upgrade
Upgrade
npm/n8nto a version that resolves this vulnerability.Fixed in 1.123.43 - Configuration
Add 'n8n-nodes-base.xml' to the NODES_EXCLUDE environment variable to disable the XML node as a temporary mitigation.
n8n NODES_EXCLUDE = n8n-nodes-base.xml - Configuration
Limit workflow creation and editing permissions to fully trusted users only to reduce risk until the product is upgraded.
n8n workflow_creation_and_editing_permissions = trusted_users_only
Event History
Frequently Asked Questions
What is the severity of CVE-2026-44791?
CVE-2026-44791 has a significant severity level due to the potential for remote code execution (RCE) on the n8n host.
How do I fix CVE-2026-44791?
To fix CVE-2026-44791, upgrade to n8n version 1.123.43, 2.20.7, or 2.22.1.
Who is affected by CVE-2026-44791?
Authenticated users with permission to create or modify workflows in n8n are affected by CVE-2026-44791.
What is the potential impact of CVE-2026-44791?
The potential impact of CVE-2026-44791 includes the ability to bypass security measures leading to remote code execution.
Is there a patch available for CVE-2026-44791?
Yes, patches for CVE-2026-44791 are included in n8n versions 1.123.43, 2.20.7, and 2.22.1.