CVE-2025-29927 | 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 appl
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.
- 🔗 github.com/vercel/next.js/security/advisories/GHSA-f…
- 🔗 github.com/vercel/next.js/commit/52a078da3884efe6501…
- 🔗 github.com/vercel/next.js/commit/5fd3ae8f8542677c629…
- 🔗 github.com/vercel/next.js/releases/tag/v12.3.5
- 🔗 github.com/vercel/next.js/releases/tag/v13.5.9
- 🔗 www.openwall.com/lists/oss-security/2025/03/23/3
- 🔗 www.openwall.com/lists/oss-security/2025/03/23/4
- 🔗 security.netapp.com/advisory/ntap-20250328-0002/
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| Tier | 2026-08-29 | 2026-09-02 |
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CVE-2025-29927 | 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 appl
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