{"id":"CVE-2026-92598","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-92598","summary":"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…","details":"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.","published":"2026-09-16T22:18:30.840","modified":"2026-09-16T22:18:30.840","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/nodemailer/nodemailer/commit/259c32d","label":"nodemailer/nodemailer@259c32d"},"references":[{"type":"WEB","url":"https://github.com/nodemailer/nodemailer/commit/259c32d"},{"type":"WEB","url":"https://github.com/nodemailer/nodemailer/commit/b212ac4"},{"type":"WEB","url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/nodemailer-before-9.1.0-idn-punycode-domain-allow-list-bypass"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T22:18:30.840"}}