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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| n8n-io | n8n | < 1.123.55, >= 2.0.0-rc.0, < 2.25.7, >= 2.26.0, < 2.26.2 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | n8n | < 1.123.55 | 1.123.55 | GHSA-v733-mwr6-fgcm |
| npm | n8n | >= 2.26.0, < 2.26.2 | 2.26.2 | GHSA-v733-mwr6-fgcm |
| npm | n8n | >= 2.0.0-rc.0, < 2.25.7 | 2.25.7 | GHSA-v733-mwr6-fgcm |
Advisories 2
- WID-SEC-2026-1875 n8n: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 8, 2026
- NCSC-2026-0212 Kwetsbaarheden verholpen in n8n workflow automation platform NCSC-NL (Netherlands) · Jun 29, 2026