An authenticated user with permission to create or modify workflows could exploit a prototype pollution vulnerability in the GSuiteAdmin node. By supplying a crafted parameter as part of node configuration, an attacker could write attacker-controlled values onto Object.prototype. An attacker could use this prototype pollution to achieve remote code execution on the n8n instance.
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.
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 NODES_EXCLUDE environment variable.
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
| Score | Percentile |
|---|---|
| 0.33% | 55.67% |
| Base score | Version | Severity | Vector |
|---|---|---|---|
| 10.0 | 3.1 | — |
|
| 9.4 | 4.0 | — |
|
| Type | Value |
|---|---|
| GHSA | GHSA-mxrg-77hm-89hv ↗ |
| CVE | CVE-2026-33696 ↗ |
| CWE id | Name |
|---|---|
| CWE-1321 | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') |
Vulnerable version ranges and first patched releases as published by GitHub.
| Ecosystem | Package | Vulnerable range | First patched | Vulnerable functions |
|---|---|---|---|---|
| npm | n8n | = 2.14.0 | 2.14.1 | — |
| npm | n8n | >= 2.0.0-rc.0, < 2.13.3 | 2.13.3 | — |
| npm | n8n | < 1.123.27 | 1.123.27 | — |