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CVE-2026-82662— Nodemailer before 8.0.8 TLS Certificate Validation Bypass

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.

在 Nodemailer 8.0.8 之前的版本中， 通过设置 禁用了 TLS 证书验证，使得攻击者能够拦截 OAuth2 令牌请求。处于中间人位置的攻击者可以捕获通过被破坏的 HTTPS 连接传输的 OAuth 客户端密钥、刷新令牌和访问令牌。

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-82662

Vulnerability Information
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Vulnerability Title
Nodemailer before 8.0.8 TLS Certificate Validation Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
nodemailer nodemailer 0 ~ 8.0.8 -

II. Public POCs for CVE-2026-82662

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III. Intelligence Information for CVE-2026-82662

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Other References for CVE-2026-82662 (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-2026-82660 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
CVE-2026-82853 4.9 MEDIUM Nodemailer before 8.0.5 SMTP Command Injection via CRLF

IV. Related Vulnerabilities

Same product: nodemailer
Same vendor: nodemailer
Same weakness: CWE-295

V. Comments for CVE-2026-82662

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