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    CVE-2026-82662

    Nodemailer before 8.0.8 disables TLS certificate verification in lib/fetch/index.js through rejectUnauthorized: false, allowing attackers to intercept OAuth2 token requests. Attackers in a machine-in-the-middle position can capture OAuth client secrets, refresh tokens, and access tokens transmitted over compromised HTTPS connections.

    Published:Aug 31, 2026
    Last Modified:Sep 1, 2026
    EPS:Aug 31, 2026
    EPSS Score:0.00124
    CVSS Score:6.5

    Affected Products

    Vendor
    Nodemailer
    Product
    Nodemailer

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-295 Improper Certificate Validation

    Related CVEs

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    CVE-2026-82853 (CVSS 6.9) — Nodemailer versions before 8.0.5 contain an SMTP command injection vulnerability in the transport name option …
    CVE-2026-82661 (CVSS 5.3) — Nodemailer before 8.0.9 fails to sanitize carriage return and line feed characters in list comment fields, all…
    CVE-2026-82660 (CVSS 5.3) — Nodemailer before 8.0.9 fails to enforce disableFileAccess and disableUrlAccess options during message normali…
    CVE-2026-82659 (CVSS 7.1) — nodemailer before 9.0.1 fails to apply disableFileAccess and disableUrlAccess flags to message-level raw optio…
    CVE-2024-58379 (CVSS 6.9) — nodemailer before 6.9.9 contains a regular expression denial of service vulnerability in email parsing when at…
    CVE-2025-14874 (CVSS 7.5) — A flaw was found in Nodemailer. This vulnerability allows a denial of service (DoS) via a crafted email addres…
    CVE-2021-23400 (CVSS 6.3) — The package nodemailer before 6.6.1 are vulnerable to HTTP Header Injection if unsanitized user input that may…
    CVE-2020-7769 (CVSS 8.6) — This affects the package nodemailer before 6.4.16. Use of crafted recipient email addresses may result in arbi…

    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