CVE-2026-94486Next.js: Information disclosure in the Next.js development server's Model Context Protocol endpoint
Updated under an hour ago ()
Does this affect you?
It affects vercel next.js. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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
- 2.3 LOW (v4.0, CNA)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
- Weakness (CWE)
- CWE-346
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Oct 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
vercel next.js vercel:next.js (from the name) | from 16.0.0, < 16.3.8 | CNA record |
vercel next.js vercel:next.js | from 16.0.0 before 16.3.8 | NVD |
References
- https://github.com/vercel/next.js/security/advisories/GHSA-39w2-rjm5-chcvx-refsource-confirm, vendor-advisory
- https://github.com/vercel/next.js/commit/2d9f50a409312696145b82b3157aadb6b1fef476x-refsource-misc, patch
- https://github.com/vercel/next.js/releases/tag/v16.3.8x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.