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Description

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.

PUBLISHED Reserved 2026-01-05 | Published 2026-01-10 | Updated 2026-01-13 | Assigner GitHub_M




HIGH: 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

@remix-run/react < 2.17.3
affected

react-router >= 7.0.0, < 7.12.0
affected

References

github.com/...router/security/advisories/GHSA-8v8x-cx79-35w7

cve.org (CVE-2026-21884)

nvd.nist.gov (CVE-2026-21884)

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