CVE-2026-100702

MEDIUMCVSS 5.9

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.

Timeline

Published:September 26th, 2026 2:16 PM

Last modified:September 30th, 2026 4:32 PM

CVSS Scoring

CVSS v3: 5.9 (MEDIUM)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-674

References & Reports

Advisories, patches, and third-party reports

https://github.com/nodemailer/nodemailer/security/advisories/GHSA-8vvx-rff5-p5rq
https://www.vulncheck.com/advisories/nodemailer-before-10.0.2-stack-exhaustion-via-nested-recipient-arrays

Source: NIST NVD · Data may lag official sources by up to one minute