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Vulnerabilities

Vulnerability · CVE-2026-94486

Information disclosure in the Next.js development server's Model Context Protocol endpoint

Published Sep 30, 2026 · catalog updated Sep 30, 2026 · Information disclosure in the

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-94486. EPSS is 0.11%. Act only if a listed version of Information disclosure in the is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Information disclosure in the).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.11%
Remediation
Version ranges on file
Affected products
npm next

The Next.js development server ( ) 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 are affected. Production deployments do not serve this endpoint.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • npm next>= 16.0.0

How to fix CVE-2026-94486

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-94486. EPSS is 0.11%. Act only if a listed version of Information disclosure in the is installed.

Which versions are affected?

Compare what you have installed with >= 16.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.11%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Next.js security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 30, 2026 · Maintainer security tabs

    Detected

    The Next.js development server ( ) 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 are affected. Pro

Sources

  • CVE.orgVulnerability recordCVE-2026-94486

    Official CVE identifier

    cve.org
  • Maintainer security tabsVendor advisoryGHSA-39w2-rjm5-chcv

    The Next.js development server ( ) 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 are affected. Pro

    github.com

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Maintainer security tabsNov 2, 2026