Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-90776— Nodemailer 9.1.0 through 10.0.4 Denial of Service via Quadratic Address Parsing

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 9.1.0版本至10.0.4版本存在资源管理错误漏洞，该漏洞源于addressparser组件解析带RFC 5322注释的电子邮件地址时存在二次时间复杂度问题，攻击者可构造含注释分隔原子的恶意邮件标头，消耗大量CPU并阻塞Node.js事件循环数秒，导致拒绝服务。

CVSS 7.5 · High EPSS 0.68% · P53

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
nodemailer nodemailer 9.1.0< 10.0.5 affected
10.0.5 unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-90776

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Nodemailer 9.1.0 through 10.0.4 Denial of Service via Quadratic Address Parsing
Source: CVE Program / CVE List V5
Vulnerability Description
Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.
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
Vulnerability Title
Nodemailer 资源管理错误漏洞
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 9.1.0版本至10.0.4版本存在资源管理错误漏洞，该漏洞源于addressparser组件解析带RFC 5322注释的电子邮件地址时存在二次时间复杂度问题，攻击者可构造含注释分隔原子的恶意邮件标头，消耗大量CPU并阻塞Node.js事件循环数秒，导致拒绝服务。
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 9.1.0 ~ 10.0.5 -

II. Public POCs for CVE-2026-90776

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-90776

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-90776 (1)

Vendor Advisories for CVE-2026-90776 (2)

Vendor Pages for CVE-2026-90776 (2)

IV. Related Vulnerabilities

Same product: nodemailer
Same vendor: nodemailer
Same weakness: CWE-407