React Router SSR XSS in ScrollRestoration

Description

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.

Recommendation

Update the @remix-run/react package to the latest compatible version. Followings are version details:

• Affected version(s): < 2.17.3
• Patched version(s): 2.17.3

References

• GHSA-8v8x-cx79-35w7
• CVE-2026-21884
• CWE-79
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• svelte vulnerable to Cross-site Scripting - CVE-2025-15265
• Angular vulnerable to Cross-site Scripting - CVE-2020-7676
• angular Prototype Pollution vulnerability - CVE-2019-10768
• rollbar vulnerable to prototype pollution - CVE-2025-57325

Tags:

npm

@remix-run/react