GHSA-f82v-jwr5-mffw
Authorization Bypass in Next.js Middleware
Quick fix
GHSA-f82v-jwr5-mffw — next: upgrade to the fixed version with the command below.
npm install next@13.5.9Details
# 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, we 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_)
Are you affected?
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Affected packages
References
- https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffw[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2025-29927[ADVISORY]
- https://github.com/vercel/next.js/commit/52a078da3884efe6501613c7834a3d02a91676d2[WEB]
- https://github.com/vercel/next.js/commit/5fd3ae8f8542677c6294f32d18022731eab6fe48[WEB]
- https://github.com/vercel/next.js[PACKAGE]
- https://github.com/vercel/next.js/releases/tag/v12.3.5[WEB]
- https://github.com/vercel/next.js/releases/tag/v13.5.9[WEB]
- https://security.netapp.com/advisory/ntap-20250328-0002[WEB]
- https://vercel.com/changelog/vercel-firewall-proactively-protects-against-vulnerability-with-middleware[WEB]
- http://www.openwall.com/lists/oss-security/2025/03/23/3[WEB]
- http://www.openwall.com/lists/oss-security/2025/03/23/4[WEB]