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CVE-2026-44579

CVE-2026-44579 · Next.js: Denial of Service via connection exhaustion in applications using Cache Components

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 to before 15.5.16 and 16.2.5, applications using Partial Prerendering through the Cache Components feature can be vulnerable to connection exhaustion through crafted POST requests to a server action. In affected configurations, a malicious request can trigger a request-body handling deadlock that leaves connections open for an extended period, consuming file descriptors and server capacity until legitimate users are denied service. This vulnerability is fixed in 15.5.16 and 16.2.5.

CVSS 7.5 · High · EPSS 0.8% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • next.js

    Versions
    • >= 16.0.0, < 16.2.5: Affected
    • >= 15.0.0, < 15.5.16: Affected

    No fix published

  • next npm

    Affected ranges
    • SEMVER: ≥ 15.0.0, < 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

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