What is CVE-2026-42227?

CVE-2026-42227 is a medium-severity vulnerability in N8n, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-05-04.

How severe is CVE-2026-42227?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in N8n

CVE-2026-42227

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an authenticated user with a valid API key scoped to variable:list could read variables from projects they are not a member of by supplying…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (10.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-639 — Authorization Bypass Through User-Controlled Key

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22 (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42227?: CVE-2026-42227 is a medium-severity vulnerability in N8n, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-05-04.
How severe is CVE-2026-42227?: Medium severity. CVSS v3 base score is 6.5 out of 10.