CVE-2026-56348

CriticalCVSS 9.9/10Last modified Jun 24, 2026

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.

Metrics

CVSS 3.1 9.9/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-918

Affected software

Vendor	Product	Versions
n8n	n8n	< 2.20.0

References

Timeline

Published: Jun 22, 2026
Last modified: Jun 24, 2026
NVD status: Analyzed

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