MajorCritical vulnerability

CVE-2026-100702 (CVSS 8.2)

NVD · officialPublished Sep 26, 2026Risk 37/100

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.

Technical details

CVSS

8.2

AV:NetworkAC:HighPR:NoneUI:None

Evidence and sources

This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.

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