CVE-2026-65597 n8n-io CVE debrief

Who should care

Users of n8n versions before 1.123.64, 2.x before 2.29.8, and before 2.30.1 should apply patches to prevent exploitation of this vulnerability. This includes operators, administrators, and security teams responsible for managing and securing n8n deployments. Additionally, vulnerability management teams should prioritize patching affected systems to mitigate potential exposure.

Technical summary

The vulnerability exists in the HTML preview feature of n8n, a workflow automation tool, where execution output is rendered 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. This issue affects users with global:member privileges, who can exploit the vulnerability to execute actions on behalf of other users. The vulnerability has a CVSS score of 8.2 and is classified as HIGH severity.

Defensive priority

High

Recommended defensive actions

• Apply patches to update n8n to version 1.123.64, 2.29.8, or 2.30.1
• Restrict access to the HTML preview feature
• Monitor for suspicious activity in n8n logs
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-07-22T12:18:19.913Z and has not been modified since then. The NVD entry is currently Undergoing Analysis. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The vulnerability exists in the HTML preview feature of n8n, a workflow automation tool. The NVD entry and CVE record provide the most current and accurate information.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.