CVE-2026-53663
React Router: Potential CSRF via PUT/PATCH/DELETE document requests
Description
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>`).
How to fix CVE-2026-53663
To remediate CVE-2026-53663, upgrade the affected package to a fixed version below.
- —upgrade to 7.15.1 or later
- —upgrade to 2.17.5 or later
Is CVE-2026-53663 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-53663.
Affected packages (2)
- >= 7.12.0, < 7.15.1
- >= 2.17.3, < 2.17.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N |