Vulnerability Details CVE-2026-65597
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 32.4%
CVSS Severity
CVSS v3 Score 5.4