CVE-2026-121426
Published:November 03, 2026
Updated:November 04, 2026
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.
Affected Packages
https://github.com/nodemailer/nodemailer.git (GITHUB):
Affected version(s) >=v3.0.0 <v10.1.4 || >=v4.0.0 <v10.1.4 || >=v5.0.0 <v10.1.4 || >=v6.0.0 <v10.1.4 || >=v7.0.0 <v10.1.4 || >=v8.0.0 <v10.1.4 || >=v9.0.0 <v10.1.4 || >=v10.0.0 <v10.1.4Fix Suggestion:
Update to version v10.1.4nodemailer (NPM):
Affected version(s) >=10.0.0 <10.1.4 || >=6.0.0 <10.1.4 || >=4.0.0 <10.1.4 || >=9.0.0 <10.1.4 || >=8.0.0 <10.1.4 || >=7.0.0 <10.1.4 || >=3.0.0 <10.1.4 || >=5.0.0 <10.1.4Fix Suggestion:
Update to version 10.1.4Related Resources (7)
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:
0.22