{"cve":"CVE-2026-42342","nvd":{"published":"2026-06-02T20:16:36.693","modified":"2026-07-21T19:10:00.107","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78"],"products":["shopify:react-router","shopify:remix-run\\/server-runtime"],"source":"nvd","synced_at":"2026-10-19T22:37:48.043517290+00:00"},"epss":{"cve":"CVE-2026-42342","score":0.00299,"percentile":0.22654,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8x6r-g9mw-2r78","url":"https://osv.dev/vulnerability/GHSA-8x6r-g9mw-2r78","summary":"React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint","modified":"2026-09-10T03:50:48.994159583Z","packages":[{"ecosystem":"npm","name":"react-router","purl":"pkg:npm/react-router","ranges":[">=7.0.0 <7.15.0"],"fixed":["7.15.0"]},{"ecosystem":"npm","name":"@remix-run/server-runtime","purl":"pkg:npm/%40remix-run/server-runtime","ranges":[">=2.10.0 <2.17.5"],"fixed":["2.17.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}