CVE-2026-53667
Medium
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.
SeverityMedium
CVSS6.9
Exploit probability—
Product
Shopify React-router
Shopify React-routerPublishedJul 27, 2026
First seenJul 27, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- shopify react-router7.18.0 or later
- react-router7.18.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| shopify react-router | 7.11.0 ≤ v < 7.18.0 | 7.18.0 |
| react-routernpm | 7.11.0 ≤ v < 7.18.0 | 7.18.0 |
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