CVE-2026-110872
Nodemailer 3.0.0 before 10.0.10 Denial of Service via SMTP Reply Parsing
- State
- Published
- Severity
- 8.2 High
- Published
- Oct 14, 2026
- Updated
- Oct 15, 2026
- Reserved
- Oct 14, 2026
Description
Nodemailer from 3.0.0 before 10.0.10 contains a quadratic complexity denial of service vulnerability in the SMTP client reply parser in SMTPConnection._onData and isPartialResponse. A malicious SMTP server or on-path attacker can stream continuation lines without a completion line before authentication, blocking the Node.js event loop and exhausting memory.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-400 Uncontrolled Resource Consumption
Affected Products
| Product | Versions |
|---|---|
nodemailernodemailer |
|
References
- GitHub Security Advisory (GHSA-4g23-2xm8-66gc)vendor-advisory
- VulnCheck Advisory: Nodemailer 3.0.0 before 10.0.10 Denial of Service via SMTP Reply Parsingthird-party-advisory
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