HighGHSA-8x6r-g9mw-2r78CVE-2026-42342

React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint

Published 3 Jun 2026 · Updated 10 Sept 2026

Affected packages

react-routernpm

Affected: >=7.0.0 <7.15.0
Fixed in: 7.15.0

Update to the fixed version for your release line, for example:npm install react-router@7.15.0

@remix-run/server-runtimenpm

Affected: >=2.10.0 <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

There exists a potential DOS attack vector in React Router Framework Mode applications (as well as Remix v2.10.0 - 2.17.4). Certain requests can be crafted to consume disproportionate resources on the server, resulting in response time degredation and/or service unavailability for end users.

> [!NOTE] > This does not impact your React Router application if you are using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).

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References

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