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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Vercel Next.Js
cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*
|
16.0.0
|
16.3.8
|
References 3
https://github.com/vercel/next.js/commit/2d9f50a409312696145b82b3157aadb6b1fef4…
security-advisories@github.com
https://github.com/vercel/next.js/releases/tag/v16.3.8
security-advisories@github.com
https://github.com/vercel/next.js/security/advisories/GHSA-f87g-xv8r-7p7x
security-advisories@github.com