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CVE PROGRAM SOURCE RECORD5.4 Medium

CVE-2026-33244

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

Description

React Router is a router for React. In versions 7.5.1 through 7.13.1, when using Framework Mode with pre-rendering enabled, improper neutralization of the HTTP `Location` header value can permit Cross-Site Scripting (XSS) in the statically generated HTML files if the redirect location comes from an untrusted source. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in version 7.13.2.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

remix-run react-router

  • >= 7.5.1, < 7.13.2affected

References