Description
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.
Affected products
shopify: react-router
References5
- github.com/remix-run/react-router/commit/ce596e823f0d7b883a433a… Patch
- github.com/remix-run/react-router/pull/15177 Issue TrackingPatch
- github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180 Release Notes
- github.com/remix-run/react-router/releases/tag/[email protected]… Release Notes
- github.com/remix-run/react-router/security/advisories/GHSA-h8fp… Third Party Advisory
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 30 · as of 13 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.