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    CVE-2026-82661

    Nodemailer before 8.0.9 fails to sanitize carriage return and line feed characters in list comment fields, allowing attackers to inject arbitrary message headers. An attacker with control over list.*.comment parameters can inject CRLF sequences to create additional headers in generated RFC822 messages, altering mail client behavior and message semantics.

    Published:Aug 31, 2026
    Last Modified:Sep 2, 2026
    EPS:Aug 31, 2026
    EPSS Score:0.0019
    CVSS Score:5.4

    Affected Products

    Vendor
    Nodemailer
    Product
    Nodemailer

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-15 Command Delimiters
    CAPEC-81 Web Server Logs Tampering

    Related CVEs

    CVE-2026-82854 (CVSS 9.3) — Nodemailer before 8.0.4 is vulnerable to SMTP command injection through the unsanitized envelope.size paramete…
    CVE-2026-82853 (CVSS 6.9) — Nodemailer versions before 8.0.5 contain an SMTP command injection vulnerability in the transport name option …
    CVE-2026-82662 (CVSS 8.3) — Nodemailer before 8.0.8 disables TLS certificate verification in lib/fetch/index.js through rejectUnauthorized…
    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