N8N N8N — CVE-2026-56348 (Critical)

Date Jun 22, 2026

Type Vendor advisory

Signal Critical vendor advisory

Vendor / Product N8N · N8N

CVE CVE-2026-56348

Critical vendor advisory CVE-2026-56348

Summary

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.

Why it matters

This CVE carries a CRITICAL severity rating (CVSS 9.1) in N8N N8N. Patch or mitigate promptly. EPSS percentile: 16%.

Operator check

Review CVE-2026-56348 in your asset inventory. Apply patches per vendor guidance and verify N8N is not exposed. CVSS score: 9.1. EPSS probability: 0.2%; percentile: 16%.

Sources

NVD — CVE-2026-56348 Source reference Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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