What is CVE-2026-42230?

CVE-2026-42230 is a medium-severity vulnerability in N8n, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-05-04.

How severe is CVE-2026-42230?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in N8n

CVE-2026-42230

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, the /mcp-oauth/register endpoint accepted OAuth client registrations without authentication, allowing arbitrary redirect_uri values to be r…

Vulnerability class: Open Redirect

EPSS: 0.001 (16.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

N8n — versions 2.18.0
N8n-io N8n — versions < 1.123.32, >= 2.17.0, < 2.17.4, >= 2.18.0, < 2.18.1

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-f6x8-65q6-j9m9 (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42230?: CVE-2026-42230 is a medium-severity vulnerability in N8n, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-05-04.
How severe is CVE-2026-42230?: Medium severity. CVSS v3 base score is 6.1 out of 10.