Uncontrolled Recursion in nodemailer - CVE-2026-100702
Published: September 30, 2026
Vulnerability identifier: #VU153015
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-100702
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in Nodemailer's recipient address parsing when processing deeply nested recipient arrays. A remote attacker can submit deeply nested recipient arrays to cause a denial of service.
Process termination requires the synchronous exception to be unhandled by the integrating application.
Affected software
nodemailer
How to mitigate CVE-2026-100702
Install security update from vendor's website.
nodemailer - update to 10.0.2