What is CVE-2026-56348?

CVE-2026-56348 is a critical-severity vulnerability in N8n, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2026-06-22.

How severe is CVE-2026-56348?

Critical severity. CVSS v3 base score is 9.1 out of 10.

SSRF in N8n

CVE-2026-56348

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 ac…

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L.

Affected products

N8n — versions 0, 2.20.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56348?: CVE-2026-56348 is a critical-severity vulnerability in N8n, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2026-06-22.
How severe is CVE-2026-56348?: Critical severity. CVSS v3 base score is 9.1 out of 10.