What is CVE-2026-42228?

CVE-2026-42228 is a medium-severity vulnerability in N8n, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-05-04.

How severe is CVE-2026-42228?

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

Is CVE-2026-42228 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in N8n

CVE-2026-42228

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, the /chat WebSocket endpoint used by the Chat Trigger node's Hosted Chat feature did not verify that an incoming connection was authorized…

Vulnerability class: Broken Access Control

EPSS: 0.001 (24.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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-862 — Missing Authorization

Public proof-of-concept exploits

rudSarkar/CVE-2026-42228

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-f77h-j2v7-g6mw (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42228?: CVE-2026-42228 is a medium-severity vulnerability in N8n, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-05-04.
How severe is CVE-2026-42228?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2026-42228 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.