CVE-2026-64642
Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale
- State
- Published
- Severity
- 8.3 High
- Published
- Jul 27, 2026
- Updated
- Jul 28, 2026
- Reserved
- Jul 20, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.3 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
- CWE-285 Improper Authorization
Affected Products
| Product | Versions |
|---|---|
next.jsvercel |
|
References
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