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Next.js: Information disclosure in the Next.js development server's Model Context Protocol endpoint

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-94486

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-94486

next.js

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "vercel",
    "product": "next.js",
    "versions": [
      {
        "status": "affected",
        "version": ">= 16.0.0, < 16.3.8"
      }
    ]
  }
]
Related CVEs
CVE-2026-94486

Source reference: /cveMetadata/cveId

Publisher severity

low

Source reference: /containers/cna/metrics

Event
#8032 · Revision 1
Added to Heist Feed
Publisher date
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