| Component | n8n |
| Severity | medium (CVSS 5.4) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| Published (NVD) | 2026-06-23 |
| Last modified | 2026-06-26 |
| Affected versions | n8n < 1.123.55 n8n >= 2.0.0, < 2.25.7 n8n >= 2.26.0, < 2.26.2 |
| Fixed in | 1.123.55, 2.25.7, 2.26.2 |
| Weakness | CWE-79 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
1.123.55or later (or the patched release of your branch: 2.25.7, 2.26.2). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
Read more
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