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CVE-2026-44582

CVE-2026-44582 · Next.js: Cache poisoning via collisions in React Server Component cache-busting

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 13.4.6 to before 15.5.16 and 16.2.5, React Server Component responses can be vulnerable to cache poisoning in deployments that rely on shared caches with insufficient response partitioning. In affected conditions, collisions in the _rsc cache-busting value can allow an attacker to poison cache entries so users receive the wrong response variant for a given URL. This vulnerability is fixed in 15.5.16 and 16.2.5.

CVSS 3.7 · Low · EPSS 0.2% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • next.js

    Versions
    • >= 13.4.6, < 15.5.16: Affected
    • >= 16.0.0, < 16.2.5: Affected

    No fix published

  • next npm

    Affected ranges
    • SEMVER: ≥ 13.4.6, < 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

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