CVE-2026-92598

Name	CVE-2026-92598
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
node-nodemailer (PTS)	bookworm	6.8.0+~6.4.6-1	vulnerable
	trixie	6.10.0+~6.4.17-1+deb13u1	vulnerable
	forky	10.0.0+~8.0.1-1	fixed
	sid	10.0.10+~8.0.1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
node-nodemailer	source	(unstable)	10.0.0+~8.0.1-1

Notes

https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp
Fixed by: https://github.com/nodemailer/nodemailer/commit/259c32d7d266301e3377a212776c3fff993c0148 (v9.1.0)
Fixed by: https://github.com/nodemailer/nodemailer/commit/b212ac4e27bce8182478044fcb8d1642ccdad46e (v9.1.0)