GHSA-84g9-w2xq-vcv6
React Router: Potential CSRF via PUT/PATCH/DELETE document requests
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | react-router | >= 7.12.0, < 7.15.1 | 7.15.1 |
| npm | @remix-run/server-runtime | >= 2.17.3, < 2.17.5 | 2.17.5 |
Details
As written in the advisory (Markdown source, shown as plain text).
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.
> [!NOTE]
> This does not impact your React Router application if you are using [Declarative Mode](https://reactrouter.com/start/modes#framework) (`<BrowserRouter>`) or [Data Mode](https://reactrouter.com/start/modes#data) (`createBrowserRouter`/`<RouterProvider>`).
References
External links from the advisory. They lead to third-party sites.