CVE-2026-65597 PUBLISHED

n8n before 1.123.64 DOM-Based XSS via Unsandboxed iframe

Assigner: VulnCheck
Reserved: 22.07.2026 Published: 22.07.2026 Updated: 22.07.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
CVSS Score: 8.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	Low	Integrity	Low
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	Active

CVSS 4.0

Product Status

Vendor	n8n-io
Product	n8n
Versions	Default: unaffected affected from 0 to 1.123.64 (excl.) Version 1.123.64 is unaffected

Vendor	n8n-io
Product	n8n
Versions	Default: unaffected affected from 0 to 2.30.1 (excl.) Version 2.30.1 is unaffected

Vendor	n8n-io
Product	n8n
Versions	Default: unaffected affected from 0 to 2.29.8 (excl.) Version 2.29.8 is unaffected

Credits

odgrso reporter

References

Problem Types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE