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CVE-2026-21884

CVE-2026-21884 · React Router SSR XSS in ScrollRestoration

This page contains facts from public vulnerability sources. Check the original advisory before updating.

React Router is a router for React. In @remix-run/react version prior to 2.17.3. and react-router 7.0.0 through 7.11.0, 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. There is no impact if server-side rendering in Framework Mode is disabled, or if Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>) is being used. This issue has been patched in @remix-run/react version 2.17.3 and react-router version 7.12.0.

CVSS 8.2 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • react-router

    Versions
    • @remix-run/react < 2.17.3: Affected
    • react-router >= 7.0.0, < 7.12.0: Affected

    No fix published

  • react-router npm

    Affected ranges
    • SEMVER: ≥ 7.0.0, < 7.12.0

    Update to 7.12.0

  • @remix-run/react npm

    Affected ranges
    • SEMVER: < 2.17.3

    Update to 2.17.3

Original sources

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