What’s Vulnerable › Vulnerabilities
CVE-2026-54301: n8n: Same-Origin XSS in Respond to Webhook Node
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-23 · updated 2026-10-26
- Weakness: CWE-79
Description
n8n is an open source workflow automation platform. Prior to 1.123.55, 2.25.7, and 2.26.2, an authenticated user with workflow edit access could configure a Respond to Webhook node to serve binary content with an attacker-controlled Content-Type. The binary response path bypassed the central Content-Security-Policy sandbox header, allowing a public webhook to execute JavaScript in the n8n origin when visited by an authenticated user, with access to that user's session. This vulnerability is fixed in 1.123.55, 2.25.7, and 2.26.2.
Affected products
- n8n-io n8n: before 1.123.55; from 2.0.0 before 2.25.7; from 2.26.0 before 2.26.2 — fixed in 1.123.55, 2.25.7, 2.26.2
How to fix
Upgrade to a fixed version: n8n-io n8n 1.123.55, 2.25.7, 2.26.2. Check the vendor advisory for mitigations.
References
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