CVE-2026-100700
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Sep 26, 2026
Vendor
unknown
Description
nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of seconds, causing service unavailability.