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    CVE-2026-92596

    Nodemailer before 9.1.0 contains a quadratic time complexity vulnerability in the addressparser component that allows remote attackers to cause denial of service by supplying a crafted comma-separated address list. Attackers can send a single email with a large number of addresses to block the Node.js event loop for extended periods, consuming 100% CPU and freezing the process.

    Published:Sep 16, 2026
    Last Modified:Sep 18, 2026
    EPS:Sep 16, 2026
    EPSS Score:0.00453
    CVSS Score:7.5

    Affected Products

    Vendor
    Nodemailer
    Product
    Nodemailer

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-121424 (CVSS 8.3) — Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that allows rem…
    CVE-2026-110872 (CVSS 8.2) — Nodemailer from 3.0.0 before 10.0.10 contains a quadratic complexity denial of service vulnerability in the SM…
    CVE-2026-110871 (CVSS 7.1) — Nodemailer from 3.0.0 before 10.0.10 contains a denial of service vulnerability in MessageParser.parseHeaders …
    CVE-2026-110870 (CVSS 6.9) — Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation vulnerability in its address parser…
    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…
    CVE-2026-100702 (CVSS 8.2) — Nodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, an…
    CVE-2026-100701 (CVSS 6) — Nodemailer versions 5.0.0 through 10.0.1 use a process-global DNS cache that is keyed only by the DNS host, wh…
    CVE-2026-100700 (CVSS 8.7) — nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback re…

    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