CVE-2026-33696— n8n Vulnerable to Prototype Pollution in XML & GSuiteAdmin node parameters lead to RCE
Quick assessment
Affected
n8n-io n8n
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 2.14.1之前版本、2.13.3之前版本和1.123.27之前版本存在安全漏洞，该漏洞源于XML和GSuiteAdmin节点存在原型污染，可能导致远程代码执行。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-33696
Vulnerability Information
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Vulnerability Title
n8n Vulnerable to Prototype Pollution in XML & GSuiteAdmin node parameters lead to RCE
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 2.14.1之前版本、2.13.3之前版本和1.123.27之前版本存在安全漏洞，该漏洞源于XML和GSuiteAdmin节点存在原型污染，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-33696
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-33696 (1)
Same Patch Batch · n8n-io · 2026-03-25 · 11 CVEs total
| CVE-2026-27496 | n8n has In-Process Memory Disclosure in its Task Runner | |
| CVE-2026-33660 | n8n Has Multiple Remote Code Execution Vulnerabilities in Merge Node AlaSQL SQL Mode | |
| CVE-2026-33663 | n8n Vulnerable to Credential Theft via Name-Based Resolution and Permission Checker Bypass | |
| CVE-2026-33665 | n8n: LDAP Email-Based Account Linking Allows Privilege Escalation and Account Takeover | |
| CVE-2026-33713 | n8n Vulnerable to SQL Injection in Data Table Node via orderByColumn Expression | |
| CVE-2026-33722 | n8n Has External Secrets Authorization Bypass in Credential Saving | |
| CVE-2026-33720 | n8n Has Authorization Bypass in OAuth Callback via N8N_SKIP_AUTH_ON_OAUTH_CALLBACK | |
| CVE-2026-33724 | n8n's Source Control SSH Configuration Uses StrictHostKeyChecking=no | |
| CVE-2026-33749 | n8n Vulnerable to XSS via Binary Data Inline HTML Rendering | |
| CVE-2026-33751 | n8n Vulnerable to LDAP Filter Injection in LDAP Node |
IV. Related Vulnerabilities
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Same vendor: n8n-io
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CVE-2026-103260
n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass v -
CVE-2026-103259
n8n before 2.39.6 and 2.40.x before 2.40.1 Session Token Lea -
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Same weakness: CWE-1321
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V. Comments for CVE-2026-33696
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