CVE-2026-92598
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.
Debilidad
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.
Referencias
- https://github.com/nodemailer/nodemailer/commit/259c32d
- https://github.com/nodemailer/nodemailer/commit/b212ac4
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp
- https://www.vulncheck.com/advisories/nodemailer-before-9.1.0-idn-punycode-domain-allow-list-bypass
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp
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