GHSA-vhcw-f978-xjjg

Summary

Duplicate Advisory: DOM-Based XSS via Unsandboxed iframe srcdoc in HTML Preview

Severity

high

CWE

CWE-79

Published

2026-07-22

Updated

2026-07-22

Advisory details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-p3rg-hrf9-w9gj. This link is maintained to preserve external references.

Original 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.

References

• https://github.com/advisories/GHSA-vhcw-f978-xjjg
• https://github.com/n8n-io/n8n/security/advisories/GHSA-p3rg-hrf9-w9gj
• https://nvd.nist.gov/vuln/detail/CVE-2026-65597
• https://www.vulncheck.com/advisories/n8n-before-dom-based-xss-via-unsandboxed-iframe

Related advisories

• CVE-2026-86083 — high · npm/n8n
• CVE-2026-86082 — high · npm/n8n
• CVE-2026-86081 — high · npm/n8n
• CVE-2026-86075 — high · npm/n8n
• CVE-2026-86076 — high · npm/n8n
• CVE-2026-86073 — medium · npm/n8n
• CVE-2026-86074 — medium · npm/n8n
• CVE-2026-86995 — medium · npm/n8n

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