Описание
Authorization Bypass in Next.js Middleware
Impact
It is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware.
Patches
- For Next.js 15.x, this issue is fixed in
15.2.3 - For Next.js 14.x, this issue is fixed in
14.2.25 - For Next.js 13.x, this issue is fixed in
13.5.9 - For Next.js 12.x, this issue is fixed in
12.3.5 - For Next.js 11.x, consult the below workaround.
Note: Next.js deployments hosted on Vercel are automatically protected against this vulnerability.
Workaround
If patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the x-middleware-subrequest header from reaching your Next.js application.
Credits
- Allam Rachid (zhero;)
- Allam Yasser (inzo_)
Ссылки
- https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffw
- https://nvd.nist.gov/vuln/detail/CVE-2025-29927
- https://github.com/vercel/next.js/commit/52a078da3884efe6501613c7834a3d02a91676d2
- https://github.com/vercel/next.js/commit/5fd3ae8f8542677c6294f32d18022731eab6fe48
- https://github.com/vercel/next.js/releases/tag/v12.3.5
- https://github.com/vercel/next.js/releases/tag/v13.5.9
- https://security.netapp.com/advisory/ntap-20250328-0002
- https://vercel.com/changelog/vercel-firewall-proactively-protects-against-vulnerability-with-middleware
- http://www.openwall.com/lists/oss-security/2025/03/23/3
- http://www.openwall.com/lists/oss-security/2025/03/23/4
Пакеты
next
>= 13.0.0, < 13.5.9
13.5.9
next
>= 14.0.0, < 14.2.25
14.2.25
next
>= 15.0.0, < 15.2.3
15.2.3
next
>= 11.1.4, < 12.3.5
12.3.5
Связанные уязвимости
Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the x-middleware-subrequest header from reaching your Next.js application. This vulnerability is fixed in 12.3.5, 13.5.9, 14.2.25, and 15.2.3.
Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the x-middleware-subrequest header from reaching your Next.js application. This vulnerability is fixed in 12.3.5, 13.5.9, 14.2.25, and 15.2.3.
Уязвимость механизма обработки заголовков x-middleware-subrequest программной платформы создания веб-приложений Next.js, позволяющая нарушителю обойти существующие ограничения безопасности