CVE-2026-92598
mediumNodemailer before 9.1.0 fails to apply UTS-46 normalization when encoding international domain names, causing the domain resolver to compute a different Punyco…
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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/nodemailer/nodemailer/commit/259c32d disclosure@vulncheck.com
- https://github.com/nodemailer/nodemailer/commit/b212ac4 disclosure@vulncheck.com
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/nodemailer-before-9.1.0-idn-punycode-domain-allow-lis... disclosure@vulncheck.com
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp 134c704f-9b21-4f2e-91b3-4a467353bcc0