Verified

ghsa:GHSA-VM5R-23W9-M8HX: nodemailer >= 9.1.0, <= 10.0.4

Duplicate Advisory: Nodemailer addressparser: O(n^2) on comment-joined addresses enables a remote DoS (reachable via mailparser). Affected range: >= 9.1.0, <= 10.0.4.

Affected technology

nodemailer · >= 9.1.0, <= 10.0.4
Vendor not specified by the source

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service. Source advisory’s CVSS 3.1 assessment rates confidentiality and integrity impact as none; availability impact as high.

Published 12-Oct-2026 10:15 UTC

Product: nodemailer
KEV: no

Provenance

GitHub Advisory Database · Source record · observed 2026-10-06 00:14:20.210633+00:00 UTC

Stable permalink: https://cybercodered.org/item/adv-ghsa-ghsa-vm5r-23w9-m8hx.html