# smtp-server (npm) vulnerabilities

1 known vulnerability (1 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 3.21.3 (Oct 29, 2026): no advisory affects it
- Newest unaffected release: 3.21.3 (Oct 29, 2026), the latest release
- Weekly downloads: 923.1K
- Dependents: 189
- Releases: 113 since 1.0.0 (Feb 16, 2015)
- Registry: https://www.npmjs.com/package/smtp-server
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-38728: 1.0.0 to 3.18.2 (3.18.3 is outside it)

## Advisories (1)

### [CVE-2026-38728](https://cve.now/CVE-2026-38728): An issue in Nodemailer smtp\_server before v.3.18.3 allows a remote attacker to cause a denial of service via the SMTPStream.\_write…

- Severity: High 7.5
- Published: May 15, 2026
- Affected: fixed in 3.18.3.
- Fixed in 3.18.3 (released Mar 25, 2026, 51 days before disclosure).
- The latest release, 3.21.3, is not affected.
- 18% of smtp-server downloads last week were affected versions (217.6K).

---

Source: cve.now
Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.
Page: https://cve.now/packages/npm/smtp-server
Site guide for agents: https://cve.now/llms.txt
Uses NVD data; not endorsed by NVD.