CVE-2026-54301
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability—
Product
N8n
PublishedJun 23, 2026
First seenJun 23, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- n8n n8n1.123.55, 2.25.7, 2.26.2 or later
- n8n1.123.55, 2.26.2, 2.25.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| n8n n8n | v < 1.123.55, 2.0.0 ≤ v < 2.25.7, 2.26.0 ≤ v < 2.26.2 | 1.123.55, 2.25.7, 2.26.2 |
| n8nnpm | v < 1.123.55, 2.26.0 ≤ v < 2.26.2, 2.0.0-rc.0 ≤ v < 2.25.7 | 1.123.55, 2.26.2, 2.25.7 |
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