CVE-2026-56348

n8n before 2.20.0 contains a credential exfiltration vulnerability in the POST /rest/dynamic-node-parameters/options endpoint that allows authenticated users to bypass Allowed HTTP Request Domains restrictions. Attackers with credential access can cause the n8n server to issue HTTP requests with credentials to unauthorized hosts, exfiltrating sensitive authentication data.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.3

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/security/advisories/GHSA-3875-8gcx-7v46	Vendor Advisory
https://www.vulncheck.com/advisories/n8n-credential-exfiltration-via-allowed-http-request-domains-bypass-in-dynamic-node-parameters-endpoint	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n8n:n8n:::::community:node.js::
	cpe:2.3:a:n8n:n8n:::::enterprise:node.js::

History

24 Jun 2026, 16:46

Type	Values Removed	Values Added
First Time		N8n N8n n8n
References	~~() https://github.com/n8n-io/n8n/security/advisories/GHSA-3875-8gcx-7v46 -~~	() https://github.com/n8n-io/n8n/security/advisories/GHSA-3875-8gcx-7v46 - Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/n8n-credential-exfiltration-via-allowed-http-request-domains-bypass-in-dynamic-node-parameters-endpoint -~~	() https://www.vulncheck.com/advisories/n8n-credential-exfiltration-via-allowed-http-request-domains-bypass-in-dynamic-node-parameters-endpoint - Third Party Advisory
CPE		cpe:2.3:a:n8n:n8n:::::enterprise:node.js:: cpe:2.3:a:n8n:n8n:::::community:node.js::

22 Jun 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-22 22:16

Updated : 2026-06-24 16:46

NVD link : CVE-2026-56348

Mitre link : CVE-2026-56348

CVE.ORG link : CVE-2026-56348

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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