5.9Medium
CVE-2026-100702Nodemailer before 10.0.2 Stack Exhaustion via Nested Recipient Arrays
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.
Weakness (CWE):
CWE-674
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| nodemailer | nodemailer | < 10.0.2, fixed 10.0.2 |
References and patches
- GitHub Security Advisory (GHSA-8vvx-rff5-p5rq) vendor-advisory
- VulnCheck Advisory: Nodemailer before 10.0.2 Stack Exhaustion via Nested Recipient Arrays third-party-advisory