CVE-2026-56348
CRITICAL
NVD
CVSS Score
9.1
Severity
CRITICAL
Published
Jun 22, 2026
Vendor
unknown
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.