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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.

PUBLISHED Reserved 2026-04-26 | Published 2026-06-02 | Updated 2026-06-03 | Assigner GitHub_M




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-400: Uncontrolled Resource Consumption

Product status

>= 7.0.0, < 7.15.0
affected

>= 2.10.0, < 2.17.5
affected

References

github.com/...router/security/advisories/GHSA-8x6r-g9mw-2r78

cve.org (CVE-2026-42342)

nvd.nist.gov (CVE-2026-42342)

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