Disclosure summary
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-reported weakness categories
CWE-346
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-94485
Open original source · Updated Oct 05, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| vercel | next.js | * {"versionStartIncluding":"16.0.0","versionEndExcluding":"16.3.8"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Patch
- github.com — Release Notes
- github.com — Vendor Advisory
PUBLISHED 2026-10-02T12:16:51-04:00
MODIFIED 2026-10-05T10:57:42-04:00
INGESTED 2026-10-06T11:45:30-04:00