CVE-2025-29927

Summary

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.

Impact & exploitability

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://github.com/vercel/next.js/commit/52a078da3884efe6501613c7834a3d02a91676d2 ↗

Additional information

• NVD record
• https://github.com/vercel/next.js/commit/52a078da3884efe6501613c7834a3d02a91676d2Patch
• https://github.com/vercel/next.js/commit/5fd3ae8f8542677c6294f32d18022731eab6fe48Patch
• https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffwAdvisory
• https://github.com/vercel/next.js/releases/tag/v12.3.5
• https://github.com/vercel/next.js/releases/tag/v13.5.9
• http://www.openwall.com/lists/oss-security/2025/03/23/3Advisory
• http://www.openwall.com/lists/oss-security/2025/03/23/4
• https://security.netapp.com/advisory/ntap-20250328-0002/Advisory