Improper Input Validation Affecting node-nodemailer package, versions *


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.22% (12th percentile)

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  • Snyk IDSNYK-ECHOLATEST-NODENODEMAILER-20969814
  • published15 Oct 2026
  • disclosed14 Oct 2026

Introduced: 14 Oct 2026

NewCVE-2026-110870  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest node-nodemailer.

NVD Description

Note: Versions mentioned in the description apply only to the upstream node-nodemailer package and not the node-nodemailer package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1