CVE-2026-94484: Vercel Next.js

Medium severity, CVSS 4.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Vercel Next.js: from 15.0.0, before 15.5.27 (fixed in 15.5.27); from 16.0.0, before 16.3.8 (fixed in 16.3.8)

Published 2026-10-02. Last modified 2026-10-05.