CVE-2026-42342
React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint
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.
| CWE | CWE-400 |
| Vendor | remix-run |
| Product | react-router |
| Published | Jun 2, 2026 |
| Last Updated | Jun 3, 2026 |
Get instant alerts for remix-run react-router
Be the first to know when new high vulnerabilities affecting remix-run react-router are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H