CVE-2026-56348
Received Received - Intake
Credential Exfiltration in n8n Workflow Automation

Publication date: 2026-06-22

Last updated on: 2026-06-22

Assigner: VulnCheck

Description
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.
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Meta Information
Published
2026-06-22
Last Modified
2026-06-22
Generated
2026-06-23
AI Q&A
2026-06-23
EPSS Evaluated
N/A
NVD
CVE-2026-56348
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
n8n n8n to 2.20.0 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
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Executive Summary

This vulnerability exists in n8n versions before 2.20.0 and involves the POST /rest/dynamic-node-parameters/options endpoint. It allows authenticated users to bypass the restrictions set by Allowed HTTP Request Domains. As a result, attackers who have access to credentials can make the n8n server send HTTP requests with those credentials to unauthorized hosts, leading to the exfiltration of sensitive authentication data.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of sensitive authentication credentials. Attackers with credential access can exploit this flaw to make the n8n server send requests to unauthorized external hosts, potentially leaking confidential authentication data. This can result in compromised accounts, unauthorized access to systems, and further exploitation of connected services.

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