---
id: CVE-2026-121424
title: Nodemailer 3.0.0 before 10.1.4 Address Parsing Bypass via Nested Comments
summary: >-
  Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability
  in addressparser that allows remote attackers to redirect recipients by ending
  nested RFC 5322 comments at the first closing parenthesis. Attackers can
  submit …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-20
vendor: nodemailer
product: nodemailer
affected:
  - nodemailer >= 3.0.0 < 10.1.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-03T17:21:51.266358Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T18:30:19.723Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121424'
references:
  - url: >-
      https://github.com/nodemailer/nodemailer/security/advisories/GHSA-8c8m-p3m8-cjg8
    label: GitHub Security Advisory (GHSA-8c8m-p3m8-cjg8)
  - url: >-
      https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.1.4-address-parsing-bypass-via-nested-comments
    label: >-
      VulnCheck Advisory: Nodemailer 3.0.0 before 10.1.4 Address Parsing Bypass
      via Nested Comments
tags:
  - cve.org
epss: 0.00337
epssPercentile: 0.27312
ingestedAt: '2026-11-05T20:33:06.356Z'
---

## Overview

Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that allows remote attackers to redirect recipients by ending nested RFC 5322 comments at the first closing parenthesis. Attackers can submit addresses whose nested comment hides an attacker address, bypassing conformant validators and recipient allow lists to receive mail or spoof senders in mailparser.

## Affected

- `nodemailer >= 3.0.0 < 10.1.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.