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CVE-2026-82853— Nodemailer before 8.0.5 SMTP Command Injection via CRLF

Quick assessment

Affected
nodemailer nodemailer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nodemailer 在 8.0.5 版本之前存在 SMTP 命令注入漏洞，该漏洞位于用于 EHLO/HELO 命令的“传输名称”选项。由于 参数未经过滤地直接拼接到 SMTP 命令中（未对回车符和换行符进行净化），攻击者可借此注入任意 SMTP 命令，从而实施邮件伪造和网络钓鱼攻击。

CVSS 4.9 · Medium

Possible ATT&CK Techniques 1 AI

T1565.002 · Transmitted Data Manipulation
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I. Basic Information for CVE-2026-82853

Vulnerability Information
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Vulnerability Title
Nodemailer before 8.0.5 SMTP Command Injection via CRLF
Source: CVE Program / CVE List V5
Vulnerability Description
Nodemailer versions before 8.0.5 contain an SMTP command injection vulnerability in the transport name option used in EHLO/HELO commands. The name parameter is concatenated directly into SMTP commands without sanitizing carriage return and line feed characters, allowing attackers to inject arbitrary SMTP commands for email spoofing and phishing attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
nodemailer nodemailer 0 ~ 8.0.5 -

II. Public POCs for CVE-2026-82853

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III. Intelligence Information for CVE-2026-82853

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Other References for CVE-2026-82853 (2)

Same Patch Batch · nodemailer · 2026-08-31 · 7 CVEs total

CVE-2026-82854 9.8 CRITICAL Nodemailer before 8.0.3 SMTP Command Injection via envelope.size
CVE-2026-82659 7.1 HIGH nodemailer before 9.0.1 File Read and SSRF via raw option
CVE-2026-82662 6.5 MEDIUM Nodemailer before 8.0.8 TLS Certificate Validation Bypass
CVE-2026-82660 5.4 MEDIUM Nodemailer jsonTransport bypasses disableFileAccess and disableUrlAccess
CVE-2026-82661 5.4 MEDIUM Nodemailer CRLF Injection via List-* Header Comments
CVE-2024-58379 5.3 MEDIUM nodemailer before 6.9.9 ReDoS via attachDataUrls parameter

IV. Related Vulnerabilities

Same product: nodemailer
Same vendor: nodemailer
Same weakness: CWE-93

V. Comments for CVE-2026-82853

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