GHSA-mxrg-77hm-89hv: n8n: Prototype Pollution in XML and GSuiteAdmin node parameters lead to RCE
Summary
A prototype pollution vulnerability (a type of attack that modifies how objects are created in JavaScript) in n8n's GSuiteAdmin node allows authenticated users to execute arbitrary code on the n8n server by crafting malicious workflow parameters. An attacker with permission to create or modify workflows could exploit this to gain control over the entire n8n instance.
Solution / Mitigation
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. If upgrading is not immediately possible, administrators can: (1) limit workflow creation and editing permissions to fully trusted users only, or (2) disable the XML node by adding `n8n-nodes-base.xml` to the `NODES_EXCLUDE` environment variable. The source notes these workarounds do not fully remediate the risk and should only be used as short-term measures.
Vulnerability Details
EPSS: 0.5%
Yes
March 26, 2026
Classification
Taxonomy References
Affected Vendors
Affected Packages
Related Issues
Original source: https://github.com/advisories/GHSA-mxrg-77hm-89hv
First tracked: March 26, 2026 at 02:00 PM
Classified by LLM (prompt v3) · confidence: 85%