Vulnerability in N8n
CVE-2026-72766
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (36.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002
Affected products
- N8n — versions 2.32.0
- N8n-Io N8n — versions 0, 1.123.67, 2.32.1
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-2x35-3fw4-9jr4 (vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/n8n-before-arbitrary-file-read-via-send-email-node (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-72766?
- CVE-2026-72766 is a high-severity vulnerability in N8n, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 7.5/10. Published 2026-08-11.
- How severe is CVE-2026-72766?
- High severity. CVSS v3 base score is 7.5 out of 10.