CVE-2026-64642: Access Control Flaw

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.

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Weakness Type (CWE)

CWE-285 CWE-285

References

Other References

https://github.com/vercel/next.js/commit/6bf4df14508ad6c0cd46af50c6051ee42f2d9151 https://github.com/vercel/next.js/pull/96014 https://github.com/vercel/next.js/releases/tag/v16.2.11 https://github.com/vercel/next.js/security/advisories/GHSA-6gpp-xcg3-4w24

Frequently Asked Questions

What is CVE-2026-64642? +

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.

How do I check if I'm vulnerable to CVE-2026-64642? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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