---
id: CVE-2026-110870
title: >-
  Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation
  vulnerability in its address parser that fails to strip RFC 5322 comments
  inside angle-bracket addresses
summary: >-
  Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation
  vulnerability in its address parser that fails to strip RFC 5322 comments
  inside angle-bracket addresses. Attackers can supply recipients like a display
  name with…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-20
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T23:17:28.813'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110870'
references:
  - url: >-
      https://github.com/nodemailer/nodemailer/security/advisories/GHSA-g73g-hqqh-jr95
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/nodemailer-before-10.0.13-improper-input-validation-via-angle-bracket-address-comments
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-15T00:02:07.189Z'
---

## Overview

Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation vulnerability in its address parser that fails to strip RFC 5322 comments inside angle-bracket addresses. Attackers can supply recipients like a display name with a parenthesized comment in the domain, so illegal characters reach envelope.to and RCPT TO, causing rejected delivery or parser interpretation conflicts that bypass domain allow-lists.

## Remediation

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