CVE-2026-90776

Name	CVE-2026-90776
Description	Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.
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)
Debian Bugs	1147617

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, sid	10.0.0+~8.0.1-1	vulnerable

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)	(unfixed)			1147617

Notes

https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5
Fixed by: https://github.com/nodemailer/nodemailer/commit/c07f17518d25aca8ab2ad66968dcbca538c24b89 (v10.0.5)