CVE-2026-100702

Name	CVE-2026-100702
Description	Nodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, and bcc, allowing attackers to cause stack exhaustion. Attackers can supply a deeply nested JSON recipient array that triggers recursive Array.toString() conversion, exhausting the call stack and terminating the Node.js process.
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, sid	10.0.14+~8.0.2-1	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)	10.0.10+~8.0.1-1

Notes

[trixie] - node-nodemailer <no-dsa> (Minor issue)
[bookworm] - node-nodemailer <postponed> (Minor issue)
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-8vvx-rff5-p5rq
Fixed by: https://github.com/nodemailer/nodemailer/commit/ebe084940aef88278afc6016b78c6d1c3821bb66 (v10.0.2)