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CVE-2025-49826

CVE-2025-49826 · Next.js DoS vulnerability via cache poisoning

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 versions 15.0.4-canary.51 to before 15.1.8, a cache poisoning bug leading to a Denial of Service (DoS) condition was found in Next.js. This issue does not impact customers hosted on Vercel. Under certain conditions, this issue may allow a HTTP 204 response to be cached for static pages, leading to the 204 response being served to all users attempting to access the page. This issue has been addressed in version 15.1.8.

CVSS 7.5 · High · EPSS 1.1% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • next.js

    Versions
    • >= 15.0.4-canary.51, < 15.1.8: Affected

    No fix published

  • next npm

    Affected ranges
    • SEMVER: ≥ 15.0.4-canary.51, < 15.1.8

    Update to 15.1.8

Original sources

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