React Router is a router for React. From 7.12.0 until 7.15.1, certain CSRF checks in React Router v7 Framework Mode were insufficient and run on POST requests, but were bypassed on PUT/PATCH/DELETE requests. This is a low severity vulnerability because modern browser protections (CORS preflight, SameSite cookies) already block the cross-origin attack vectors that this missing CSRF check would otherwise gate. This vulnerability is fixed in 7.15.1.
PUBLISHED5.2CWE-352
React Router: `handleDocumentRequest` CSRF check covers `POST` only; PUT/PATCH/DELETE bypass
Problem type
Affected products
remix-run
react-router
>= 7.12.0, < 7.15.1 - AFFECTED
@remix-run
server-runtime
>= 2.17.3, < 2.17.5 - AFFECTED
References
GitHub Security Advisories
GHSA-84g9-w2xq-vcv6
React Router: Potential CSRF via PUT/PATCH/DELETE document requests
https://github.com/advisories/GHSA-84g9-w2xq-vcv6Certain CSRF checks in React Router v7 Framework Mode were insufficient and run on POST requests, but were bypassed on PUT/PATCH/DELETE requests. This is a low severity vulnerability because modern browser protections (CORS preflight, SameSite cookies) already block the cross-origin attack vectors that this missing CSRF check would otherwise gate.
[!NOTE] This does not impact your React Router application if you are using Declarative Mode (
<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).
JSON source
https://cveawg.mitre.org/api/cve/CVE-2026-53663Click to expand
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