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CVE-2026-94486— Next.js: Information disclosure in the Next.js development server's Model Context Protocol endpoint

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 是一个用于构建全栈 Web 应用的 React 框架。在版本 16.0.0 至 16.3.8 之间，next dev 开发服务器暴露了一个模型上下文协议（Model Context Protocol）端点，但未可靠地限制跨站请求。开发人员访问的恶意网站可以访问该端点，从而读取项目的磁盘位置、来自错误报告的源代码片段、路由清单以及开发日志。生产部署环境不会提供此端点。该问题已在版本 16.3.8 中修复。

CVSS 2.3 · Low

Affected Version Matrix 1

VendorProduct Version RangeStatus
vercel next.js >= 16.0.0, < 16.3.8 affected
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I. Basic Information for CVE-2026-94486

Vulnerability Information
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Vulnerability Title
Next.js: Information disclosure in the Next.js development server's Model Context Protocol endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Next.js is a React framework for building full-stack web applications. From 16.0.0 until 16.3.8, the next dev development server exposes a Model Context Protocol endpoint without reliably restricting cross-site requests. A malicious website visited by a developer can reach the endpoint and read the project's disk location, source code snippets from error reports, route inventory, and development logs. Production deployments do not serve this endpoint. This issue is fixed in version 16.3.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vercel next.js >= 16.0.0, < 16.3.8 -

II. Public POCs for CVE-2026-94486

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III. Intelligence Information for CVE-2026-94486

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Patches & Fixes for CVE-2026-94486 (1)

Vendor Advisories for CVE-2026-94486 (1)

Vendor Pages for CVE-2026-94486 (1)

Same Patch Batch · vercel · 2026-10-02 · 6 CVEs total

CVE-2026-94483 8.3 HIGH Next.js: Server-Side Request Forgery in Image Optimization
CVE-2026-94484 6.3 MEDIUM Next.js: Cache poisoning in Next.js SSG/ISR rendering leads to cross-user content substitu
CVE-2026-94485 6.3 MEDIUM Next.js: Information disclosure in Next.js App Router metadata image routes via dynamicPar
CVE-2026-94544 6.3 MEDIUM Next.js: Pending `use cache` fill can leak Draft Mode content into regular responses and p
CVE-2026-94543 6.3 MEDIUM Next.js: Cache poisoning of SSG and ISR pages in self-hosted Next.js applications

IV. Related Vulnerabilities

Same product: next.js
Same vendor: vercel
Same weakness: CWE-346

V. Comments for CVE-2026-94486

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