CVE-2026-42226

n8n is an open source workflow automation platform. Prior to versions 1.123.33 and 2.17.5, the dynamic-node-parameters endpoints did not verify whether the authenticated caller was authorized to use a supplied credential reference. An authenticated user with access to a shared workflow could supply a foreign credential ID in the request body, causing the backend to decrypt and use that credential in a helper execution path where the caller also controls the destination URL. This allowed the caller to force the backend to authenticate against attacker-controlled infrastructure using a credential belonging to another user, effectively exfiltrating a reusable API key. The issue is not limited to any single node type; any node that resolves credentials dynamically through these endpoints may be affected. This issue has been patched in versions 1.123.33, 2.17.5, and 2.18.0.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/security/advisories/GHSA-r4v6-9fqc-w5jr	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::

History

06 May 2026, 18:09

Type	Values Removed	Values Added
First Time		N8n n8n N8n
References	~~() https://github.com/n8n-io/n8n/security/advisories/GHSA-r4v6-9fqc-w5jr -~~	() https://github.com/n8n-io/n8n/security/advisories/GHSA-r4v6-9fqc-w5jr - Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CPE		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 18:09

NVD link : CVE-2026-42226

Mitre link : CVE-2026-42226

CVE.ORG link : CVE-2026-42226

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-862

Missing Authorization

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