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GHSA-h8fp-f39c-q6mh

React Router: RSCErrorHandler Missing Protocol Validation (XSS)

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-53667

Packages

EcosystemPackageAffectedFixed in
npm react-router >= 7.11.0, < 7.18.0 7.18.0

Details

As written in the advisory (Markdown source, shown as plain text).

This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62. React Router was alerted of a code path in the (unstable) RSC error handling path in which redirects from untrusted sources could still result in an XSS vector via attacker-supplied redirect targets > [!NOTE] > This only affects your application if you are using the unstable RSC APIs

References

External links from the advisory. They lead to third-party sites.