CVE-2026-65597

Medium

Description

n8n before 1.123.64, 2.x before 2.29.8, and before 2.30.1 contains a DOM-based cross-site scripting vulnerability in the HTML preview, which renders execution output into an iframe srcdoc without the sandbox attribute. A sanitizer bypass allows injected script to execute same-origin as the editor. When a victim opens the preview, the script can call authenticated APIs using the victim's session. An account with global:member privileges can exploit the issue.

SeverityMedium

CVSS5.4

Exploit probability—

Product

N8n

PublishedJul 22, 2026

First seenJul 22, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

n8n n8n1.123.64, 2.29.8 or later
n8n1.123.64, 2.30.1, 2.29.8 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-p3rg-hrf9-w9gj

Affected products

Product	Affected versions	Fixed in
n8n n8n	v < 1.123.64, 2.0.0 ≤ v < 2.29.8, 2.30.0	1.123.64, 2.29.8
n8nnpm	v < 1.123.64, 2.30.0 ≤ v < 2.30.1, 2.0.0-rc.0 ≤ v < 2.29.8	1.123.64, 2.30.1, 2.29.8

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