Medium severity · published Oct 2, 2026
CVE-2026-94486
Next.js: Information disclosure in the Next.js development server's Model Context Protocol endpoint
5.4
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
next.js · vercel
>= 16.0.0, < 16.3.8 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-94486
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-94486
x_refsource_CONFIRM
https://github.com/vercel/next.js/security/advisories/GHSA-39w2-rjm5-chcv
x_refsource_MISC
https://github.com/vercel/next.js/commit/2d9f50a409312696145b82b3157aadb6b1fef476
x_refsource_MISC
https://github.com/vercel/next.js/releases/tag/v16.3.8
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