CVE-2026-82853

Medium

Description

Nodemailer versions before 8.0.5 contain an SMTP command injection vulnerability in the transport name option used in EHLO/HELO commands. The name parameter is concatenated directly into SMTP commands without sanitizing carriage return and line feed characters, allowing attackers to inject arbitrary SMTP commands for email spoofing and phishing attacks.

SeverityMedium

CVSS4.9

Exploit probability—

ProductNodemailer

PublishedAug 31, 2026

First seenAug 31, 2026

Weakness typeCWE-93CWE-93

How to fix

Update

nodemailer8.0.5 or later

Vendor advisories

github.com/nodemailer/nodemailer/security/advisories/GHSA-vvjj-xcjg-gr5g

Affected products

Product	Affected versions	Fixed in
nodemailernpm	v < 8.0.5	8.0.5

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