GHSA-39w2-rjm5-chcv
Next.js has information disclosure in development server's Model Context Protocol endpoint
At a glance
- Published
- Updated
- CVE
- CVE-2026-94486
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CVSS_V4
- 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
Description
The Next.js development server (`next dev`) exposes a Model Context Protocol endpoint that does not verify which website a request originates from, allowing a malicious website visited by the developer to read sensitive development data — including the project's location on disk, source code snippets from error reports, the route inventory, and development logs. Only applications run with `next dev` are affected. Production deployments do not serve this endpoint.
Affected packages
| Package | Versions |
|---|---|
| npm · next | introduced 16.0.0, fixed 16.3.8 |
References
- https://github.com/vercel/next.js/security/advisories/GHSA-39w2-rjm5-chcv WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-94486 ADVISORY
- https://github.com/vercel/next.js/commit/2d9f50a409312696145b82b3157aadb6b1fef476 WEB
- https://github.com/vercel/next.js PACKAGE
- https://github.com/vercel/next.js/releases/tag/v16.3.8 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |