n8n: DOM-Based XSS via Unsandboxed iframe srcdoc in HTML Preview
- Product
- n8n
- CVE
- CVE-2026-65597
- Affected
- n8n < 1.123.64, >= 2.0.0-rc.0 < 2.29.8, >= 2.30.0 < 2.30.1
- Fixed in
- 1.123.64, 2.29.8, 2.30.1
Last verified against sources: October 26, 2026
Am I affected?
n8n: affected n8n < 1.123.64, >= 2.0.0-rc.0 < 2.29.8, >= 2.30.0 < 2.30.1. Fixed in 1.123.64, 2.29.8, 2.30.1.
- Check your version: run
npm ls n8n. Versions < 1.123.64 of n8n are affected. [1]
What to do now
- Upgrade to the fixed version: run
npm install n8n@1.123.64(first patched version 1.123.64). [1] - Upgrade to n8n 1.123.64, 2.29.8, or 2.30.1 or later. [1]
- Restrict n8n instance access to fully trusted users only. [1]
- Set the
N8N_CONTENT_SECURITY_POLICYenvironment variable to a policy that blocks inline scripts. [1] - Avoid exposing workflows that render externally-controlled input into the HTML node or binary HTML preview to untrusted users. [1]
General practice, not from the source: if the affected software could read tokens or credentials, rotate them after upgrading; pin versions and review changes before updating tools your agents run.
What happened
Impact
- When a victim opens the preview, it can call authenticated APIs with their session. [1]
What was done
Sources
- GHSA-p3rg-hrf9-w9gj — GitHub Advisory Database
Every statement above was checked against these sources before publishing. Spotted an error? Tell us and we will correct it with a dated note.
Share advisory brief with your team
Copy a plain-text summary for Slack, GitHub issues, or team security channels.
[CVE-2026-65597] n8n: DOM-Based XSS via Unsandboxed iframe srcdoc in HTML Preview
Product: n8n | Affected: n8n < 1.123.64, >= 2.0.0-rc.0 < 2.29.8, >= 2.30.0 < 2.30.1 | Fixed in: 1.123.64, 2.29.8, 2.30.1
Summary: The HTML preview renders execution output into an `iframe srcdoc` without `sandbox`.
Source & remediation on AgentArmorHQ: https://agentarmorhq.com/incidents/2026/07/cve-2026-65597-n8nCorrections
Report an error or request a correction. We review requests within 5 business days and add a dated correction note.
Discussions for CVE-2026-65597
Ask questions or share configuration tips. Governed by our Community Rules & Terms.
No posts match this filter yet.
Be the first to ask a question or share a working tip.