---
id: CVE-2026-72766
title: n8n before 1.123.67 Arbitrary File Read via Send Email Node
summary: >-
  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 workfl…
severity: high
cvss: 8.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-843
vendor: n8n-io
product: n8n
affected:
  - n8n < 1.123.67
  - n8n >= 2.32.0 < 2.32.1
  - n8n >= 2.0.0-rc.0 < 2.31.5
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-08-14T19:50:38.898583Z'
published: '2026-08-11'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T21:16:38.939Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72766'
references:
  - url: 'https://github.com/n8n-io/n8n/security/advisories/GHSA-2x35-3fw4-9jr4'
    label: GitHub Security Advisory (GHSA-2x35-3fw4-9jr4)
  - url: >-
      https://www.vulncheck.com/advisories/n8n-before-arbitrary-file-read-via-send-email-node
    label: >-
      VulnCheck Advisory: n8n before 1.123.67 Arbitrary File Read via Send Email
      Node
tags:
  - cve.org
epss: 0.00444
epssPercentile: 0.38758
ingestedAt: '2026-11-03T08:39:35.592Z'
---

## Overview

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.

## Affected

- `n8n < 1.123.67`
- `n8n >= 2.32.0 < 2.32.1`
- `n8n >= 2.0.0-rc.0 < 2.31.5`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.