---
id: CVE-2026-121425
title: >-
  Nodemailer 3.0.0 before 10.1.4 Recipient Injection via addressparser Group
  Parsing
summary: >-
  Nodemailer from 3.0.0 before 10.1.4 contains a parsing flaw in addressparser
  that ends an RFC 5322 group at a semicolon inside quoted display names or
  comments. Attackers can submit crafted group addresses that conformant
  validators appr…
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: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-03T16:55:03.726541Z'
exploitAvailable: true
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T16:55:34.338Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121425'
references:
  - url: >-
      https://github.com/nodemailer/nodemailer/security/advisories/GHSA-m943-m63m-w62w
    label: GitHub Security Advisory (GHSA-m943-m63m-w62w)
  - url: >-
      https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.1.4-recipient-injection-via-addressparser-group-parsing
    label: >-
      VulnCheck Advisory: Nodemailer 3.0.0 before 10.1.4 Recipient Injection via
      addressparser Group Parsing
tags:
  - cve.org
  - exploit-available
epss: 0.00322
epssPercentile: 0.2533
ingestedAt: '2026-11-05T20:33:06.299Z'
---

## Overview

Nodemailer from 3.0.0 before 10.1.4 contains a parsing flaw in addressparser that ends an RFC 5322 group at a semicolon inside quoted display names or comments. Attackers can submit crafted group addresses that conformant validators approve, redirecting mail to attacker-chosen recipients and bypassing recipient allow lists.

## Affected

- `nodemailer >= 3.0.0 < 10.1.4`

## Remediation

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