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.
Severity (CVSS)
| Base score | 7 |
|---|---|
| Severity | High |
| Version | CVSS 4.0 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N |
| Provided by | CNA |
Weaknesses
- CWE-79 — CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n8n-io | n8n | < 1.123.55; >= 2.0.0-rc.0, < 2.25.7; >= 2.26.0, < 2.26.2 |
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-v733-mwr6-fgcm (x_refsource_CONFIRM)
Generated from the official CVE List on 24 Jun 2026 09:35 UTC.