CVE-2026-92598
Published:September 16, 2026
Updated:September 22, 2026
Nodemailer before 9.1.0 fails to apply UTS-46 normalization when encoding international domain names, causing the domain resolver to compute a different Punycode A-label than standards-compliant parsers. Attackers can craft recipient addresses with invisible characters or compatibility mappings that pass domain allow-list checks but are delivered to attacker-controlled domains via SMTP.
Affected Packages
https://github.com/nodemailer/nodemailer.git (GITHUB):
Affected version(s) >=v3.0.0 <v9.1.0Fix Suggestion:
Update to version v9.1.0nodemailer (NPM):
Affected version(s) >=3.0.0 <9.1.0Fix Suggestion:
Update to version 9.1.0Related Resources (10)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
EPSS
Base Score:
0.26