CVE-2026-94484

Description

Next.js is a React framework for building full-stack web applications. From 15.0.0 until 15.5.27 and 16.3.8, applications with a root-level catch-all page and statically generated or Incremental Static Regeneration routes can use a shared response cache key that is insufficiently scoped to the source route. A single unauthenticated crafted request can poison that cache, causing cross-user content substitution or persistent denial of service until the poisoned entry is revalidated or replaced. This issue is fixed in versions 15.5.27 and 16.3.8.

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Weakness Type (CWE)

CWE-524 CWE-524

References

Other References

https://github.com/vercel/next.js/commit/52c94abdd2ea5f416f5e8353ea8a2edd3fe311b8 https://github.com/vercel/next.js/commit/719e4c67d6e92df60246f95e1d96e2dd60789a52 https://github.com/vercel/next.js/releases/tag/v15.5.27 https://github.com/vercel/next.js/releases/tag/v16.3.8 https://github.com/vercel/next.js/security/advisories/GHSA-mcj8-r9mp-w47p

Frequently Asked Questions

What is CVE-2026-94484? +

Next.js is a React framework for building full-stack web applications. From 15.0.0 until 15.5.27 and 16.3.8, applications with a root-level catch-all page and statically generated or Incremental Static Regeneration routes can use a shared response cache key that is insufficiently scoped to the source route. A single unauthenticated crafted request can poison that cache, causing cross-user content substitution or persistent denial of service until the poisoned entry is revalidated or replaced. This issue is fixed in versions 15.5.27 and 16.3.8.

How do I check if I'm vulnerable to CVE-2026-94484? +

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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