CVE-2026-42342
HIGH7.5React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint
Published: 6/3/2026Modified: 6/3/2026
Also known as:GHSA-8x6r-g9mw-2r78
Description
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](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, < 7.15.0
- npm/@remix-run/server-runtime>= 2.10.0, < 2.17.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |