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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是nodemailer组织开源的一个在Node.js应用中发送电子邮件的模块。 Nodemailer 8.0.5之前版本存在输入验证错误漏洞，该漏洞源于EHLO/HELO命令的transport name选项未对回车和换行字符进行清理，导致攻击者可注入任意SMTP命令，进行电子邮件欺骗和钓鱼攻击。

CVSS 4.9 · Medium EPSS 1.03% · P63

Possible ATT&CK Techniques 1 AI

T1565.002 · Transmitted Data Manipulation

Affected Version Matrix 2

VendorProduct Version RangeStatus
nodemailer nodemailer < 8.0.5 affected
8.0.5 unaffected
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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
Vulnerability Title
Nodemailer 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nodemailer是nodemailer组织开源的一个在Node.js应用中发送电子邮件的模块。 Nodemailer 8.0.5之前版本存在输入验证错误漏洞，该漏洞源于EHLO/HELO命令的transport name选项未对回车和换行字符进行清理，导致攻击者可注入任意SMTP命令，进行电子邮件欺骗和钓鱼攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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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