cyfenced.com →

[ CVE-2026-94484 · Published 2 Oct 2026 ]

Next.js has cache poisoning in SSG/ISR rendering that leads to cross-user content substitution and persistent denial of service

CVSS 4.8 EPSS <1%1 agency advisoryFix available

[ Description ]Official 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.

[ Fixes ]Fixes and patches

  • next 16.3.8Fixed version · GitHub Advisories · npm package next: upgrade to 16.3.8 or later (affected >= 16.0.0, < 16.3.8)
  • next 15.5.27Fixed version · GitHub Advisories · npm package next: upgrade to 15.5.27 or later (affected >= 15.0.0, < 15.5.27)
  • Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
  • Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Advisories ]Government CERT advisories

[ Packages ]Affected open-source packages

[ References ]References