CVE-2026-22030
MEDIUM6.5EPSS 0.03%React Router has CSRF issue in Action/Server Action Request Processing
Published: 1/8/2026Modified: 2/3/2026
Description
React Router (or Remix v2) is vulnerable to CSRF attacks on document POST requests to UI routes when using server-side route `action` handlers in [Framework Mode](https://reactrouter.com/start/modes#framework), or when using React Server Actions in the new unstable RSC modes. > [!NOTE] > This does not impact applications that use [Declarative Mode](https://reactrouter.com/start/modes#declarative) (`<BrowserRouter>`) or [Data Mode](https://reactrouter.com/start/modes#data) (`createBrowserRouter`/`<RouterProvider>`).
Affected packages (2)
- npm/react-router>= 7.0.0, < 7.12.0
- npm/@remix-run/server-runtimefrom 0, < 2.17.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |