CVE-2026-110872
mediumNodemailer 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…
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-4g23-2xm8-66gc disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.0.10-denial-of-service-via... disclosure@vulncheck.com
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-4g23-2xm8-66gc 134c704f-9b21-4f2e-91b3-4a467353bcc0