Medium severity6.5NVD Advisory· Published Sep 16, 2026
CVE-2026-92598
CVE-2026-92598
Description
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.
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Affected products
1- Range: <9.1.0
Patches
Vulnerability mechanics
References
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