CVE-2026-56348

CRITICAL SEVERITY

CVSS Score & Metrics

Base Score

9.1 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L                                    

Vulnerability 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.

Vulnerability Details

Published Date

June 22, 2026

Last Modified

June 23, 2026

CWE ID

CWE-918

Source

NVD

Vendor

n8n

Product

n8n

External References

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

CVE-2026-56348

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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