p PatchFirst

CVE-2026-44576

CVE-2026-44576 · Next.js: Cache poisoning in React Server Component responses

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Next.js is a React framework for building full-stack web applications. From 14.2.0 to before 15.5.16 and 16.2.5, applications using React Server Components can be vulnerable to cache poisoning when shared caches do not correctly partition response variants. Under affected conditions, an attacker can cause an RSC response to be served from the original URL and poison shared cache entries so later visitors receive component payloads instead of the expected HTML. This vulnerability is fixed in 15.5.16 and 16.2.5.

CVSS 5.4 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • next.js

    Versions
    • >= 14.2.0, < 15.5.16: Affected
    • >= 16.0.0, < 16.2.5: Affected

    No fix published

  • next npm

    Affected ranges
    • SEMVER: ≥ 14.2.0, < 15.5.16

    Update to 15.5.16

  • next npm

    Affected ranges
    • SEMVER: ≥ 16.0.0, < 16.2.5

    Update to 16.2.5

Original sources

Check your server →