CVE-2026-53667
CVE-2026-53667 · React Router: Cross-site Scripting is Possible due to Missing RSCErrorHandler Protocol Validation (Incomplete fix for CVE-2026-53667)
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 is a follow up to CVE-2026-53667, and only affects consuming applications if they are using the unstable RSC APIs. This issue has been fixed in version 7.18.0.
CVSS 6.9 · Medium · EPSS 0.4% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
react-router
- Versions
- >= 7.11.0, < 7.18.0: Affected
No fix published
react-router npm
- Affected ranges
- SEMVER: ≥ 7.11.0, < 7.18.0
Update to 7.18.0
Original sources
- https://github.com/remix-run/react-router/security/advisories/GHSA-h8fp-f39c-q6mh
- https://github.com/remix-run/react-router/pull/15177
- https://github.com/remix-run/react-router/commit/ce596e823f0d7b883a433af1d5a839a8b9fe0242
- https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180
- https://github.com/remix-run/react-router/releases/tag/[email protected]
- https://nvd.nist.gov/vuln/detail/CVE-2026-53667