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.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-843"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72766.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "1.123.67"
},
{
"fixed": "2.32.1"
},
{
"fixed": "2.31.5"
}
],
"source": "AFFECTED_FIELD"
}