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7.5 High

CVE-2026-42342 React Router is a router for React

Description

React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the __manifest endpoint, resulting in response time degradation and/or service unavailability for end users. This affects React Router Framework Mode applications as well as Remix applications. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5.

Affected products and versions

Product Affected versions Fixed in
react-router 7.0 7.0.0 → < 7.15.0 7.15.0
@remix-run/server-runtime 2.10 2.10.0 → < 2.17.5 2.17.5

References

Timeline

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Other CVEs of react-router

The 21 CVEs of react-router →
CVE-2026-53669 React Router is a router for React 5.1 Medium CVE-2026-55685 React Router is a router for React 8.7 High CVE-2026-53668 React Router is a router for React 6.9 Medium CVE-2026-53667 React Router is a router for React 6.9 Medium
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