CVE-2026-118648
n8n before 1.123.85, 2.43.5, and 2.44.1 Stored XSS via Webhook Responses Missing Sandbox Policy
CVSS Score
7.3
EPSS Score
0.0%
EPSS Percentile
0th
n8n before 1.123.85, 2.x before 2.43.5, and 2.44.x before 2.44.1 contains a stored cross-site scripting vulnerability because some webhook response paths, such as error responses and responses without headers, omit the sandbox Content-Security-Policy. Authenticated members who can create and activate workflows can serve HTML that runs on the n8n origin, letting scripts act with the session of users who open the webhook URL.
| CWE | CWE-79 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Oct 28, 2026 |
Stay Ahead of the Next One
Get instant alerts for n8n-io n8n
Be the first to know when new high vulnerabilities affecting n8n-io n8n are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
n8n-io / n8n
0 < 1.123.85
n8n-io / n8n
2.44.0 < 2.44.1
n8n-io / n8n
2.0.0 < 2.43.5
References
Credits
🔍 Masofgon