What is CVE-2026-42232?

CVE-2026-42232 is a high-severity vulnerability in N8n, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 8.8/10. Published 2026-05-04.

How severe is CVE-2026-42232?

High severity. CVSS v3 base score is 8.8 out of 10.

Prototype Pollution in N8n

CVE-2026-42232

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 permission to create or modify workflows could achieve global prototype pollution via the XML Node leading to RC…

Vulnerability class: Prototype Pollution

EPSS: 0.002 (41.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-hqr4-h3xv-9m3r (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42232?: CVE-2026-42232 is a high-severity vulnerability in N8n, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 8.8/10. Published 2026-05-04.
How severe is CVE-2026-42232?: High severity. CVSS v3 base score is 8.8 out of 10.