CVE-2026-100700— nodemailer before 10.0.6 Denial of Service via addressparser
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 版本低于 10.0.6 的版本中，存在一个拒绝服务（DoS）漏洞，位于 的纯文本回退正则表达式模式里。该正则表达式存在二次回溯行为。攻击者可以通过构造包含长段无空格内容的电子邮件头值，阻塞 Node.js 事件循环长达数十秒，从而导致服务不可用。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-100700
Vulnerability Information
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Vulnerability Title
nodemailer before 10.0.6 Denial of Service via addressparser
Source: CVE Program / CVE List V5
Vulnerability Description
nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of seconds, causing service unavailability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| nodemailer | nodemailer | 0 ~ 10.0.6 | - |
|
II. Public POCs for CVE-2026-100700
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-100700 (1)
Other References for CVE-2026-100700 (1)
Same Patch Batch · nodemailer · 2026-09-26 · 4 CVEs total
| CVE-2026-100702 | 5.9 MEDIUM | Nodemailer before 10.0.2 Stack Exhaustion via Nested Recipient Arrays |
| CVE-2026-100701 | 5.9 MEDIUM | Nodemailer 5.0.0 through 10.0.1 TLS servername Cache Confusion |
| CVE-2026-100699 | 5.3 MEDIUM | Nodemailer before 10.0.9 Malformed Envelope Recipient via RFC 5322 Comment |
IV. Related Vulnerabilities
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CVE-2026-100702
Nodemailer before 10.0.2 Stack Exhaustion via Nested Recipie -
CVE-2026-100701
Nodemailer 5.0.0 through 10.0.1 TLS servername Cache Confusi -
CVE-2026-100699
Nodemailer before 10.0.9 Malformed Envelope Recipient via RF -
CVE-2026-92597
Nodemailer before 9.1.0 Email Domain Validation Bypass via R -
CVE-2026-92598
Nodemailer before 9.1.0 IDN/Punycode Domain Allow-list Bypas
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CVE-2026-100702
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Nodemailer 5.0.0 through 10.0.1 TLS servername Cache Confusi -
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Nodemailer before 10.0.9 Malformed Envelope Recipient via RF -
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Nodemailer before 9.1.0 Email Domain Validation Bypass via R -
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Same weakness: CWE-407
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V. Comments for CVE-2026-100700
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