{"cve":"CVE-2026-92598","nvd":{"published":"2026-09-16T22:18:30.840","modified":"2026-09-22T20:25:55.870","status":"Awaiting Analysis","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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","score":8.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","score":6.5},"cwes":["CWE-436"],"references":["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"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:54:41.405518556+00:00"},"epss":{"cve":"CVE-2026-92598","score":0.00395,"percentile":0.33746,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-wmmp-3585-3rmp","url":"https://osv.dev/vulnerability/GHSA-wmmp-3585-3rmp","summary":"Nodemailer: IDN/Punycode domain allow-list bypass leads to email delivery to an attacker-controlled domain","modified":"2026-09-17T11:56:00.274908066Z","packages":[{"ecosystem":"npm","name":"nodemailer","purl":"pkg:npm/nodemailer","ranges":["<9.1.0"],"fixed":["9.1.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}