React Router: RSCErrorHandler Missing Protocol Validation (XSS)
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
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-53667US | medium6.1 | — | ||
React Router is a router for React. In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources. This issue… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/remix-run/react-routerPACKAGE
- https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180WEB
- https://github.com/remix-run/react-router/commit/ce596e823f0d7b883a433af1d5a839a8b9fe0242WEB
- https://github.com/remix-run/react-router/pull/15177WEB
- https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0WEB
- https://github.com/remix-run/react-router/security/advisories/GHSA-h8fp-f39c-q6mhWEB
scry
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