CVE-2026-92598 — Nodemailer before 9.1.0 IDN/Punycode Domain Allow-list Bypass
Nodemailer before 9.1.0 fails to apply UTS-46 normalization when encoding international domain names, causing the domain resolver to compute a different Punycode A-label than st…
Published: 2026-09-16 · CVSS: 8.3 · CVSS 4.0
Nodemailer before 9.1.0 fails to apply UTS-46 normalization when encoding international domain names, causing the domain resolver to compute a different Punycode A-label than standards-compliant parsers. Attackers can craft recipient addresses with invisible characters or compatibility mappings that pass domain allow-list checks but are delivered to attacker-controlled domains via SMTP.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7