p PatchFirst

CVE-2026-44580

CVE-2026-44580 · Next.js: Cross-site scripting in beforeInteractive scripts with untrusted input

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 13.0.0 to before 15.5.16 and 16.2.5, applications that use beforeInteractive scripts together with untrusted content can be vulnerable to cross-site scripting. In affected versions, serialized script content was not escaped safely before being embedded into the document, which could allow attacker-controlled input to break out of the intended script context and execute arbitrary JavaScript in a visitor's browser. This vulnerability is fixed in 15.5.16 and 16.2.5.

CVSS 6.1 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • next.js

    Versions
    • >= 13.0.0, < 15.5.16: Affected
    • >= 16.0.0, < 16.2.5: Affected

    No fix published

  • next npm

    Affected ranges
    • SEMVER: ≥ 13.0.0, < 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

Check your server →