LowGHSA-84g9-w2xq-vcv6CVE-2026-53663

React Router: Potential CSRF via PUT/PATCH/DELETE document requests

Published 15 Jun 2026 · Updated 10 Sept 2026

Affected packages

react-routernpm

Affected: >=7.12.0 <7.15.1
Fixed in: 7.15.1

Update to the fixed version for your release line, for example:npm install react-router@7.15.1

@remix-run/server-runtimenpm

Affected: >=2.17.3 <2.17.5
Fixed in: 2.17.5

Update to the fixed version for your release line, for example:npm install @remix-run/server-runtime@2.17.5

Details

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 (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).

Is GHSA-84g9-w2xq-vcv6 in any of your client repos?

Checking one package by hand is fine. Checking it across forty client projects is not. NPMscan reads the lockfiles in every GitHub repo you pick, finds each project with an affected react-router, and gives you the command that fixes it.

Scan a project free, no signup Or connect GitHub to scan every repo

References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.