CVE-2026-72766
Description
n8n before 1.123.67, 2.x before 2.31.5, and 2.32.x before 2.32.1 contain a type confusion vulnerability in the Send Email node, which does not enforce that its message fields are strings. A crafted non-string value supplied from a workflow expression into the text or HTML body field can be interpreted by the underlying mail library (Nodemailer) as a file path or URL, allowing arbitrary local file disclosure and server-side request forgery (SSRF). Exploitation requires a pre-existing active workflow with an unauthenticated webhook, valid SMTP credentials configured on the node, and untrusted input mapped directly into the body field; this is not a default configuration.
How to fix
- n8n n8n1.123.67, 2.31.5 or later
- n8n1.123.67, 2.32.1, 2.31.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| n8n n8n | v < 1.123.67, 2.0.0 ≤ v < 2.31.5, 2.32.0 | 1.123.67, 2.31.5 |
| n8nnpm | v < 1.123.67, 2.32.0 ≤ v < 2.32.1, 2.0.0-rc.0 ≤ v < 2.31.5 | 1.123.67, 2.32.1, 2.31.5 |
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