CVE-2026-92598
MEDIUMCVSS 6.5Description
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.
Timeline
Published:September 16th, 2026 10:18 PM
Last modified:September 22nd, 2026 8:25 PM
CVSS Scoring
CVSS v3: 6.5 (MEDIUM)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
- 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
Source: NIST NVD · Data may lag official sources by up to one minute