Allocation of Resources Without Limits or Throttling Affecting smtp-server package, versions <3.18.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-SMTPSERVER-17705947
- published30 Jun 2026
- disclosed15 May 2026
- creditblue2cat
Introduced: 15 May 2026
CVE-2026-38728 (opens in a new tab)How to fix?
Upgrade smtp-server to version 3.18.3 or higher.
Overview
smtp-server is a Create custom SMTP servers on the fly
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the SMTPStream._write process. An attacker can cause excessive memory consumption and potentially crash the server by continuously sending data without newline characters, which prevents the buffer from being cleared.