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CVE-2026-21884

🔴 HIGH

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 Frame...

Published
Jan 10, 2026
Last Modified
Jan 13, 2026
Views
8
Bookmarks
0

Description

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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 Scores

CVSS 3.1 8.2
8.2
HIGH
CVSS 2.0 8.2

References

github.com

Additional Information

Source
security-advisories@github.com
State
Awaiting analysis

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