React Router SSR XSS in ScrollRestoration
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 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 () or Data Mode (createBrowserRouter/) is being used. This issue has been patched in @remix-run/react version 2.17.3 and react-router version 7.12.0.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
react-routernpm | >= 7.0.0, < 7.12.0 | 7.12.0 |
@remix-run/reactnpm | < 2.17.3 | 2.17.3 |
Affected products
3- ghsa-coords2 versions
< 2.17.3+ 1 more
- (no CPE)range: < 2.17.3
- (no CPE)range: >= 7.0.0, < 7.12.0
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-8v8x-cx79-35w7ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-21884ghsaADVISORY
- github.com/remix-run/react-router/security/advisories/GHSA-8v8x-cx79-35w7ghsax_refsource_CONFIRMWEB
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