CVE-2026-100702
Fixed in a distro release EPSS <1%CVSS 5.9
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.
Products: nodemailer
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| npm | nodemailer | 10.0.2 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | node-nodemailer | no fix |
| Debian 13 | node-nodemailer | no fix |
| Debian 14 | node-nodemailer | 10.0.10+~8.0.1-1 |
| Ubuntu 20.04 LTS | node-nodemailer | no fix |
| Ubuntu 22.04 LTS | node-nodemailer | no fix |
| Ubuntu 24.04 LTS | node-nodemailer | no fix |
| Ubuntu 26.04 LTS | node-nodemailer | no fix |
| Ubuntu 26.10 | node-nodemailer | no fix |