CVE-2026-110871
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Oct 14, 2026
Vendor
unknown
Description
Nodemailer from 3.0.0 before 10.0.10 contains a denial of service vulnerability in MessageParser.parseHeaders that allows users to exhaust CPU through quadratic header unfolding. Attackers can supply large recipient lists or long headers that fold into tens of thousands of continuation lines, blocking the Node.js event loop during DKIM signing.