CVE-2026-100700 [HIGH] – nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser f

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.