CVE-2026-94486
Next.js: Information disclosure in the Next.js development server's Model Context Protocol endpoint
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Passive
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Next.js: Information disclosure in the Next.js development server's Model Context Protocol endpoint
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.
- Record
CVE-2026-94486- CVSS 4.0
- 2.3 Low
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-346
- Updated
- 2026-11-02
EUVDEUVD-2026-91667
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.
- Record
EUVD-2026-91667- CVSS 4.0
- 2.3 Low
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-39w2-rjm5-chcv
Next.js has information disclosure in development server's Model Context Protocol endpoint
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.
- Record
GHSA-39w2-rjm5-chcv- CVSS 4.0
- 2.3 Low
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 - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-94486- CVSS 4.0
- 2.3 Low
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
OSV
Next.js: Information disclosure in the Next.js development server's Model Context Protocol endpoint
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.
- Record
CVE-2026-94486- CVSS 4.0
- 2.3 Low
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-346
- Updated
- 2026-11-02
OSVGHSA-39w2-rjm5-chcv
Next.js has information disclosure in development server's Model Context Protocol endpoint
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.
- Record
GHSA-39w2-rjm5-chcv- CVSS 4.0
- 2.3 Low
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 - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
Show 15 moreShow less
OSVCLSA-2026-1791978826 No score
TuxCare security update for next (5 CVEs)
TuxCare rebuilt next to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1791978826- Updated
- 2026-11-02
OSVCLSA-2026-1792195752 No score
TuxCare security update for create-next-app (5 CVEs)
TuxCare rebuilt create-next-app to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792195752- Updated
- 2026-11-02
OSVCLSA-2026-1792196732 No score
TuxCare security update for @next/eslint-plugin-next (5 CVEs)
TuxCare rebuilt @next/eslint-plugin-next to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792196732- Updated
- 2026-11-02
OSVCLSA-2026-1792206293 No score
TuxCare security update for @next/bundle-analyzer (5 CVEs)
TuxCare rebuilt @next/bundle-analyzer to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792206293- Updated
- 2026-11-02
OSVCLSA-2026-1792256970 No score
TuxCare security update for next-rspack (5 CVEs)
TuxCare rebuilt next-rspack to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792256970- Updated
- 2026-11-02
OSVCLSA-2026-1792272234 No score
TuxCare security update for @next/plugin-storybook (5 CVEs)
TuxCare rebuilt @next/plugin-storybook to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792272234- Updated
- 2026-11-02
OSVCLSA-2026-1792293005 No score
TuxCare security update for @next/polyfill-module (5 CVEs)
TuxCare rebuilt @next/polyfill-module to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792293005- Updated
- 2026-11-02
OSVCLSA-2026-1792304725 No score
TuxCare security update for @next/polyfill-nomodule (5 CVEs)
TuxCare rebuilt @next/polyfill-nomodule to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792304725- Updated
- 2026-11-02
OSVCLSA-2026-1792326298 No score
TuxCare security update for @next/react-refresh-utils (5 CVEs)
TuxCare rebuilt @next/react-refresh-utils to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792326298- Updated
- 2026-11-02
OSVCLSA-2026-1792338248 No score
TuxCare security update for @next/third-parties (5 CVEs)
TuxCare rebuilt @next/third-parties to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792338248- Updated
- 2026-11-02
OSVCLSA-2026-1792346474 No score
TuxCare security update for @next/swc-linux-x64-gnu (5 CVEs)
TuxCare rebuilt @next/swc-linux-x64-gnu to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792346474- Updated
- 2026-11-02
OSVCLSA-2026-1792358591 No score
TuxCare security update for @next/codemod (5 CVEs)
TuxCare rebuilt @next/codemod to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792358591- Updated
- 2026-11-02
OSVCLSA-2026-1792363991 No score
TuxCare security update for @next/mdx (5 CVEs)
TuxCare rebuilt @next/mdx to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792363991- Updated
- 2026-11-02
OSVCLSA-2026-1792367398 No score
TuxCare security update for @next/swc-linux-arm64-gnu (5 CVEs)
TuxCare rebuilt @next/swc-linux-arm64-gnu to address 5 CVEs. Fixed in 16.0.6-tuxcare.13.
- Record
CLSA-2026-1792367398- Updated
- 2026-11-02
OSVROOT-APP-NPM-CVE-2026-94486 No score
CVE-2026-94486 in next - Patched by Root
Root has patched CVE-2026-94486 in the next package for Root:npm. Multiple fixed versions available.
- Record
ROOT-APP-NPM-CVE-2026-94486- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
nextnpm |
16.0.0 up to 16.3.8 | 16.3.8 |
nextTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.116.0.6-tuxcare.1016.0.6-tuxcare.1116.0.6-tuxcare.12 Show 8 moreShow less16.0.6-tuxcare.216.0.6-tuxcare.316.0.6-tuxcare.416.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
create-next-appTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
@next/eslint-plugin-nextTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
@next/bundle-analyzerTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
next-rspackTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
@next/plugin-storybookTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
@next/polyfill-moduleTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
@next/polyfill-nomoduleTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
@next/react-refresh-utilsTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
Show 7 moreShow less
| Package | Affected | Fixed |
|---|---|---|
@next/third-partiesTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
@next/swc-linux-x64-gnuTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.316.0.6-tuxcare.416.0.6-tuxcare.5 Show 4 moreShow less16.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
@next/codemodTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
@next/mdxTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.1216.0.6-tuxcare.316.0.6-tuxcare.4 Show 5 moreShow less16.0.6-tuxcare.516.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
@next/swc-linux-arm64-gnuTuxCare:npm From an advisory covering 5 CVEs |
16.0.6-tuxcare.0 up to 16.0.6-tuxcare.13, plus listed versions 16.0.616.0.6-tuxcare.1016.0.6-tuxcare.316.0.6-tuxcare.416.0.6-tuxcare.5 Show 4 moreShow less16.0.6-tuxcare.616.0.6-tuxcare.716.0.6-tuxcare.816.0.6-tuxcare.9 |
16.0.6-tuxcare.13 |
nextRoot:npm |
before 16.3.8-aikido.1 | 16.3.8-aikido.1 |
@rootio/nextRoot:npm |
before 16.3.8-root.io.1 | 16.3.8-root.io.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-94486 is a low vulnerability (CVSS 2.3) in Vercel Next.js, published October 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.11%, the 1st percentile. Fixed in next 16.3.8.
References
github.com/vercel/next.js/security/advisories/GHSA-39w2-rjm5-chcv
nvd.nist.gov/vuln/detail/CVE-2026-94486