CVE-2026-125755
Received Received - Intake

Nodemailer Address Parsing Flaw Enables Domain Spoofing

Publication date: 2026-11-10

Last updated on: 2026-11-10

Assigner: VulnCheck

Description
Nodemailer 3.0.0 before 10.4.1 contains an address parsing flaw in addressparser that truncates domains at folding whitespace or comments before a dot, allowing attackers to bypass recipient domain restrictions. Attackers can submit crafted to, cc, bcc or replyTo addresses that pass RFC 5322 domain checks but deliver mail to an attacker-chosen address under the application's sender identity.

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Meta Information

Published
2026-11-10
Last Modified
2026-11-10
Generated
2026-11-10
AI Q&A
2026-11-10
EPSS Evaluated
N/A
NVD
CVE-2026-125755
EUVD
EUVD-2026-121238

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
nodemailer nodemailer From 3.0.0 (inc) to 10.4.1 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-436 Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state.

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Executive Summary

Nodemailer versions 3.0.0 to 10.4.0 have a flaw in addressparser where domains in email addresses are truncated at folding whitespace or comments before a dot. This allows attackers to craft email addresses that pass RFC 5322 checks but deliver mail to an attacker-controlled address while appearing to come from the application's sender identity.

Impact Analysis

Attackers could bypass recipient domain restrictions, sending emails to unauthorized addresses while impersonating your application. This could lead to data leaks, phishing attacks, or unauthorized access to sensitive communications.

Compliance Impact

This vulnerability could violate compliance requirements for data protection and privacy such as GDPR or HIPAA by enabling unauthorized data exfiltration through email. Organizations may face penalties for failing to protect sensitive data in transit.

Mitigation Strategies

Upgrade Nodemailer to version 10.4.1 or later to address the address parsing flaw in addressparser.

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