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    CVE-2026-110872

    Nodemailer from 3.0.0 before 10.0.10 contains a quadratic complexity denial of service vulnerability in the SMTP client reply parser in SMTPConnection._onData and isPartialResponse. A malicious SMTP server or on-path attacker can stream continuation lines without a completion line before authentication, blocking the Node.js event loop and exhausting memory.

    Published:Oct 14, 2026
    Last Modified:Oct 15, 2026
    EPS:Oct 14, 2026
    EPSS Score:0.00291
    CVSS Score:5.9

    Affected Products

    Vendor
    Nodemailer
    Product
    Nodemailer

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-110871 (CVSS 7.1) — Nodemailer from 3.0.0 before 10.0.10 contains a denial of service vulnerability in MessageParser.parseHeaders …
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    CVE-2026-110869 (CVSS 8.7) — Nodemailer 3.0.0 before 10.0.13 has a regular expression denial of service in SMTPConnection._actionEHLO, whos…
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    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