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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-64642— Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale

Quick assessment

Affected
vercel next.js
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.

Next.js 是用于构建全栈 Web 应用的 React 框架。在 16.0.0 至 16.2.10 版本中，针对使用 App Router、Turbopack 构建，并在 中配置了单个语言环境的 Next.js 应用，攻击者可以通过构造恶意请求绕过基于中间件/代理的认证机制。该问题已在 16.2.11 版本中得到修复。

CVSS 8.3 · High EPSS 1.16% · P66

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
vercel next.js >= 16.0.0, < 16.2.11 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-64642

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale
Source: CVE Program / CVE List V5
Vulnerability Description
Next.js is a React framework for building full-stack web applications. In versions 16.0.0 through 16.2.10, crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. This issue has been fixed in version 16.2.11.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vercel next.js >= 16.0.0, < 16.2.11 -

II. Public POCs for CVE-2026-64642

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-64642

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-64642 (1)

Vendor Advisories for CVE-2026-64642 (1)

Vendor Pages for CVE-2026-64642 (1)

Same Patch Batch · vercel · 2026-07-27 · 9 CVEs total

CVE-2026-64645 8.3 HIGH Next.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostn
CVE-2026-64649 8.3 HIGH Next.js: Server-Side Request Forgery in Server Actions on Custom Servers
CVE-2026-64641 8.2 HIGH Next.js: Denial of Service in App Router using Server Actions
CVE-2026-64643 6.3 MEDIUM Next.js: Unauthenticated Disclosure of Internal Server Function endpoints
CVE-2026-64644 6.3 MEDIUM Next.js: Denial of Service in the Image Optimization API using SVGs
CVE-2026-64646 6.3 MEDIUM Next.js: Unbounded Server Action payload in Edge runtime
CVE-2026-64647 6.3 MEDIUM Next.js: Response Body Cache Confusion with Invalid UTF-8 Request Bodies
CVE-2026-64648 6.0 MEDIUM Next.js: Response Body Cache Confusion for Requests Containing Bodies

IV. Related Vulnerabilities

Same product: next.js
Same vendor: vercel
Same weakness: CWE-285

V. Comments for CVE-2026-64642

No comments yet

Leave a comment