GHSA-f22v-gfqf-p8f3MediumCVSS 5.4

React Router has stored XSS via unescaped Location header in prerendered redirect HTML

Published
June 3, 2026
Last Modified
June 3, 2026

🔗 CVE IDs covered (1)

📋 Description

When using React Router v7 Framework Mode with Pre-rendering enabled, an improper neutralization of the HTTP Location header value can permit Cross-Site Scripting (XSS) in statically generated HTML files if the redirect location comes from an untrusted source.

[!NOTE] This does not impact your React Router application if you are using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).

🎯 Affected products1

  • npm/react-router:>= 7.5.1, < 7.13.2

🔗 References (3)