HighGHSA-8v8x-cx79-35w7CVE-2026-21884

React Router SSR XSS in ScrollRestoration

Published 8 Jan 2026 · Updated 8 Sept 2026

Affected packages

react-routernpm

Affected: >=7.0.0 <7.12.0
Fixed in: 7.12.0

Update to the fixed version for your release line, for example:npm install react-router@7.12.0

@remix-run/reactnpm

Affected: <2.17.3
Fixed in: 2.17.3

Update to the fixed version for your release line, for example:npm install @remix-run/react@2.17.3

Details

A XSS vulnerability exists in in React Router's <ScrollRestoration> API in Framework Mode when using the getKey/storageKey props during Server-Side Rendering which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the keys.

> [!NOTE] > This does not impact applications if developers have disabled server-side rendering in Framework Mode, or if they are using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.