high8.2
CVE-2026-64642
Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale
Impact
Next.js is a React framework for building full-stack web applications. In versions 16.0.0 through 16.2.10, crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. This issue has been fixed in version 16.2.11.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | next | >= 16.0.0, < 16.2.11 | 16.2.11 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Vercel | Next.Js | from 16.0.0 before 16.2.11 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-6gpp-xcg3-4w24
- https://github.com/vercel/next.js/security/advisories/GHSA-6gpp-xcg3-4w24
- https://github.com/vercel/next.js/pull/96014
- https://github.com/vercel/next.js/commit/6bf4df14508ad6c0cd46af50c6051ee42f2d9151
- https://github.com/vercel/next.js/releases/tag/v16.2.11