CVE-2026-64646: DoS

Description

Next.js is a React framework for building full-stack web applications. In versions 13.0.0 through 15.5.20 and 16.0.0 through 16.2.10, requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime. This issue has been fixed in versions 15.5.21 and 16.2.11.

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Weakness Type (CWE)

CWE-770 CWE-770

References

Other References

https://github.com/vercel/next.js/commit/57c31f724d746e86a9e8b92aa8be538a922446a4 https://github.com/vercel/next.js/commit/9a4651e754f70b12e397694ffc41f44c3ba8cc17 https://github.com/vercel/next.js/releases/tag/v15.5.21 https://github.com/vercel/next.js/releases/tag/v16.2.11 https://github.com/vercel/next.js/security/advisories/GHSA-4c39-4ccg-62r3

Frequently Asked Questions

What is CVE-2026-64646? +

Next.js is a React framework for building full-stack web applications. In versions 13.0.0 through 15.5.20 and 16.0.0 through 16.2.10, requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime. This issue has been fixed in versions 15.5.21 and 16.2.11.

How do I check if I'm vulnerable to CVE-2026-64646? +

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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