CVE-2026-82661

Medium

Description

Nodemailer before 8.0.9 fails to sanitize carriage return and line feed characters in list comment fields, allowing attackers to inject arbitrary message headers. An attacker with control over list.*.comment parameters can inject CRLF sequences to create additional headers in generated RFC822 messages, altering mail client behavior and message semantics.

SeverityMedium

CVSS5.4

Exploit probability—

ProductNodemailer

PublishedAug 31, 2026

First seenAug 31, 2026

Weakness typeCWE-93CWE-93

How to fix

Update

nodemailer8.0.9 or later

Vendor advisories

github.com/nodemailer/nodemailer/security/advisories/GHSA-268h-hp4c-crq3

Affected products

Product	Affected versions	Fixed in
nodemailernpm	v < 8.0.9	8.0.9

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