CVE-2026-40181
Medium
Description
React Router is a router for React. In versions 7.0.0 through 7.14.0 and 6.7.0 through 6.30.3, certain URLs passed to the redirect function can trigger an open redirect to an external domain due to path values starting with // being reinterpreted as protocol-relative URLs. The level of impact depends on the validation done by the application prior to returning the redirect. This does not impact applications using Declarative Mode (<BrowserRouter>). This is patched in versions 7.14.1 and 6.30.4.
SeverityMedium
CVSS6.1
Exploit probability—
Product
Shopify React-router
Shopify React-routerPublishedJun 2, 2026
First seenJun 2, 2026
Weakness typeCWE-601Open redirect
How to fix
Update
- shopify react-router6.30.4, 7.14.1 or later
- react-router7.14.1, 6.30.4 or later
- @remix-run/router1.23.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| shopify react-router | 6.7.0 ≤ v < 6.30.4, 7.0.0 ≤ v < 7.14.1 | 6.30.4, 7.14.1 |
| react-routernpm | 7.0.0 ≤ v < 7.14.1, 6.7.0 ≤ v < 6.30.4 | 7.14.1, 6.30.4 |
| @remix-run/routernpm | 1.3.0 ≤ v < 1.23.3 | 1.23.3 |
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