Next.js: Information disclosure in the Next.js development server's Model Context Protocol endpoint
Published Oct 2, 2026
2.3
LOWCVSS 4.0
EPSS 0.11%
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.
Affected products
-
Affected
- ≥ 16.0.0, < 16.3.8
No data.
Red Hat Enterprise Linux 10
firefox
Fix deferred
Red Hat Enterprise Linux 10
thunderbird
Fix deferred
Red Hat Enterprise Linux 7
firefox
Fix deferred
Red Hat Enterprise Linux 8
firefox
Fix deferred
Red Hat Enterprise Linux 8
thunderbird
Fix deferred
Red Hat Enterprise Linux 9
firefox
Fix deferred
Red Hat Enterprise Linux 9
thunderbird
Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3
rhelai3/bootc-cuda-rhel9
Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3
rhelai3/bootc-gaudi-rhel9
Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3
rhelai3/bootc-rocm-rhel9
Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3
rhelai3/disk-image-cuda-rhel9
Fix deferred
Red Hat Trusted Artifact Signer
rhtas/rekor-search-ui-rhel9
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | firefox | Fix deferred | n/a |
| Red Hat Enterprise Linux 10 | thunderbird | Fix deferred | n/a |
| Red Hat Enterprise Linux 7 | firefox | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | firefox | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | thunderbird | Fix deferred | n/a |
| Red Hat Enterprise Linux 9 | firefox | Fix deferred | n/a |
| Red Hat Enterprise Linux 9 | thunderbird | Fix deferred | n/a |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | rhelai3/bootc-cuda-rhel9 | Fix deferred | n/a |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | rhelai3/bootc-gaudi-rhel9 | Fix deferred | n/a |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | rhelai3/bootc-rocm-rhel9 | Fix deferred | n/a |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | rhelai3/disk-image-cuda-rhel9 | Fix deferred | n/a |
| Red Hat Trusted Artifact Signer | rhtas/rekor-search-ui-rhel9 | Out of support scope | n/a |
next
npm
Introduced 16.0.0 Fixed 16.3.8
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | next | 16.0.0 | 16.3.8 |
Remediation
No remediation recorded yet.
References (9)
- https://access.redhat.com/security/cve/CVE-2026-94486 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2545238 Issue Tracking
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-91667 Advisory
- https://github.com/advisories/GHSA-39w2-rjm5-chcv Advisory
- https://github.com/vercel/next.js/commit/2d9f50a409312696145b82b3157aadb6b1fef476 x_refsource_MISC
- https://github.com/vercel/next.js/releases/tag/v16.3.8 x_refsource_MISC
- https://github.com/vercel/next.js/security/advisories/GHSA-39w2-rjm5-chcv x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-94486
- https://www.cve.org/CVERecord?id=CVE-2026-94486
Change history (2)
- EUVD
Updated
changed from Oct 2, 2026 to Oct 7, 2026Oct 2, 2026 → Oct 7, 2026
Published
changed from Oct 2, 2026 to Oct 7, 2026Oct 2, 2026 → Oct 7, 2026
CVE.org / MITRE
CISA Vulnrichment
GitHub