CVE-2026-121424

MEDIUM 6.5

Nodemailer 3.0.0 before 10.1.4 Address Parsing Bypass via Nested Comments

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-20
Vendor	nodemailer
Product	nodemailer
Published	Nov 3, 2026

Stay Ahead of the Next One

Get instant alerts for nodemailer nodemailer

Be the first to know when new medium vulnerabilities affecting nodemailer nodemailer are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

Affected Versions

nodemailer / nodemailer

3.0.0 < 10.1.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/nodemailer/nodemailer/security/advisories/GHSA-8c8m-p3m8-cjg8 vulncheck.com: https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.1.4-address-parsing-bypass-via-nested-comments