CVE-2026-94486

Summary

Next.js has information disclosure in development server's Model Context Protocol endpoint

Severity

low

CVSS

5.4

EPSS

0.1% (p1)

CWE

CWE-346

Also known as

GHSA-39w2-rjm5-chcv

Published

2026-10-07

Updated

2026-10-07

Advisory details

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.

References

• https://github.com/advisories/GHSA-39w2-rjm5-chcv
• https://github.com/vercel/next.js/security/advisories/GHSA-39w2-rjm5-chcv
• https://nvd.nist.gov/vuln/detail/CVE-2026-94486
• https://github.com/vercel/next.js/commit/2d9f50a409312696145b82b3157aadb6b1fef476
• https://github.com/vercel/next.js/releases/tag/v16.3.8

Related advisories

• CVE-2026-94485 — medium · npm/next
• GHSA-673q-mjm6-r5xr — critical · npm/next
• GHSA-2464-fhr4-w9xw — critical · npm/next
• GHSA-vcvr-r3jv-pc5j — critical · npm/next
• GHSA-2xp9-vwfh-vxw4 — critical · npm/next
• CVE-2026-75604 — critical · npm/next
• CVE-2026-94482 — high · npm/next
• CVE-2026-94483 — high · npm/next

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