Medium severity · published Jul 22, 2026
CVE-2026-65597
n8n before 1.123.64 DOM-Based XSS via Unsandboxed iframe
5.4
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n-io
before 1.123.64; before 2.30.1; before 2.29.8 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-65597
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-65597
Mitigation
https://github.com/n8n-io/n8n/security/advisories/GHSA-p3rg-hrf9-w9gj
Third Party Advisory
https://www.vulncheck.com/advisories/n8n-before-dom-based-xss-via-unsandboxed-iframe
More from n8n
8.8
CVE-2025-68613
n8n Vulnerable to Remote Code Execution via Expression Injection
10.0
CVE-2026-54309
n8n: n8n MCP Browser HTTP Transport Exposes Unauthenticated Browser-Control Sessions
10.0
CVE-2026-21858
n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
9.9
CVE-2026-85165
n8n before 2.36.2 Expression Sandbox Bypass via SpreadElement
9.9
CVE-2026-72765
n8n before 2.32.1 Remote Code Execution via Expression Sandbox Escape