CVE-2026-121424

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    CVE-2026-121424

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: Nodemailer 3.0.0 before 10.1.4 Address Parsing Bypass via Nested Comments

    Details: Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that allows remote attackers to redirect recipients by ending nested RFC 5322 comments at the first closing parenthesis. Attackers can submit addresses whose nested comment hides an attacker address, bypassing conformant validators and recipient allow lists to receive mail or spoof senders in mailparser.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121424.json, https://github.com/nodemailer/nodemailer/security/advisories/GHSA-8c8m-p3m8-cjg8, https://nvd.nist.gov/vuln/detail/CVE-2026-121424, https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.1.4-address-parsing-bypass-via-nested-comments

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- eaef3b5217226cb092d8549752831cb2a9aeaea0
    Fixed -2a7e95294d2a4995a19e9009379daf650cdc80e6

    Affected versions

    v10.1.3
    v10.1.2
    v10.1.1
    v10.1.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-121424 | CVE-DB