What’s Vulnerable › Vulnerabilities
CVE-2026-33696: n8n Vulnerable to Prototype Pollution in XML & GSuiteAdmin node parameters lead to RCE
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.8% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-25 · updated 2026-06-17
- Weakness: CWE-1321
Description
n8n is an open source workflow automation platform. Prior to versions 2.14.1, 2.13.3, and 1.123.27, an authenticated user with permission to create or modify workflows could exploit a prototype pollution vulnerability in the XML and the GSuiteAdmin nodes. By supplying a crafted parameters 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, and/or 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.
Affected products
- n8n-io n8n: before 1.123.27; from 2.0.0 before 2.13.3; 2.14.0 — fixed in 1.123.27, 2.13.3
How to fix
Upgrade to a fixed version: n8n-io n8n 1.123.27, 2.13.3. Check the vendor advisory for mitigations.
References
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