CVE-2026-94486
MEDIUMCVSS 5.4Description
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.
Timeline
Published:October 2nd, 2026 4:16 PM
Last modified:October 5th, 2026 2:58 PM
CVSS Scoring
CVSS v3: 5.4 (MEDIUM)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Affected Software
From NVD CPE configuration data
Vendors
vercel
Products
next.js
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
Source: NIST NVD · Data may lag official sources by up to one minute