CVE-2025-59057: React Router has XSS Vulnerability

January 8, 2026 (updated January 11, 2026)

A XSS vulnerability exists in in React Router’s meta()/<Meta> APIs in Framework Mode when generating script:ld+json tags which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the tag.

[!NOTE] This does not impact applications using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).

References

github.com/advisories/GHSA-3cgp-3xvw-98x8
github.com/remix-run/react-router
github.com/remix-run/react-router/security/advisories/GHSA-3cgp-3xvw-98x8
nvd.nist.gov/vuln/detail/CVE-2025-59057

Code Behaviors & Features

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