CVE-2026-94543Next.js: Cache poisoning of SSG and ISR pages in self-hosted Next.js applications

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, self-hosted applications using the Pages Router with statically generated or Incremental Static Regeneration pages can key a response cache entry without sufficiently binding it to the source route. A request can replace one page's cache entry with content from a different route, causing the affected page to serve incorrect content to every visitor until revalidation. Applications deployed on Vercel are not affected. This issue is fixed in versions 15.5.27 and 16.3.8.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://github.com/vercel/next.js/security/advisories/GHSA-4jqv-mc3x-m676 Vendor Advisory
• https://github.com/vercel/next.js/commit/52c94abdd2ea5f416f5e8353ea8a2edd3fe311b8 Patch
• https://github.com/vercel/next.js/commit/719e4c67d6e92df60246f95e1d96e2dd60789a52 Patch
• https://github.com/vercel/next.js/releases/tag/v15.5.27 Release Notes
• https://github.com/vercel/next.js/releases/tag/v16.3.8 Release Notes