CVE-2026-42231

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, a flaw in the xml2js library used to parse XML request bodies in n8n's webhook handler allowed prototype pollution via a crafted XML payload. An authenticated user with permission to create or modify workflows could exploit this to pollute the JavaScript object prototype and, by chaining the pollution with the Git node's SSH operations, achieve remote code execution on the n8n host. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/security/advisories/GHSA-q5f4-99jv-pgg5	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n8n:n8n:::::enterprise:node.js::
	cpe:2.3:a:n8n:n8n:::::enterprise:node.js::
	cpe:2.3:a:n8n:n8n:2.18.0::::enterprise:node.js::*

History

06 May 2026, 17:14

Type	Values Removed	Values Added
References	~~() https://github.com/n8n-io/n8n/security/advisories/GHSA-q5f4-99jv-pgg5 -~~	() https://github.com/n8n-io/n8n/security/advisories/GHSA-q5f4-99jv-pgg5 - Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.8
First Time		N8n n8n N8n
CPE		cpe:2.3:a:n8n:n8n:2.18.0::::enterprise:node.js::* cpe:2.3:a:n8n:n8n:::::enterprise:node.js::

04 May 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-04 19:16

Updated : 2026-05-06 17:14

NVD link : CVE-2026-42231

Mitre link : CVE-2026-42231

CVE.ORG link : CVE-2026-42231

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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