CVE-2026-22030 — React Router has CSRF issue in Action/Server Action Request Processing

Description (CNA)

React Router is a router for React. In @remix-run/server-runtime version prior to 2.17.3. and react-router 7.0.0 through 7.11.0, 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, or when using React Server Actions in the new unstable RSC modes. There is no impact if Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>) is being used. This issue has been patched in @remix-run/server-runtime version 2.17.3 and react-router version 7.12.0.

Affected (CNA)

Vendor / product	Versions
remix-run / react-router	affected @remix-run/router < 2.17.3; affected react-router >= 7.0.0, < 7.12.0

CWE

CWE-346, CWE-352

References

https://github.com/remix-run/react-router/security/advisories/GHSA-h5cw-625j-3rxh

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.