{"id":"GHSA-8x6r-g9mw-2r78","summary":"React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint","details":"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.\n\n\u003e [!NOTE]\n\u003e This does not impact your React Router application if you are using [Declarative Mode](https://reactrouter.com/start/modes#declarative) (`\u003cBrowserRouter\u003e`) or [Data Mode](https://reactrouter.com/start/modes#data) (`createBrowserRouter`/`\u003cRouterProvider\u003e`).","aliases":["CVE-2026-42342"],"modified":"2026-08-24T00:36:54.677432110Z","published":"2026-06-03T21:05:17Z","related":["CVE-2026-55685"],"database_specific":{"cwe_ids":["CWE-400"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-06-03T21:05:17Z","nvd_published_at":"2026-06-02T20:16:36Z"},"references":[{"type":"WEB","url":"https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42342"},{"type":"PACKAGE","url":"https://github.com/remix-run/react-router"}],"affected":[{"package":{"name":"react-router","ecosystem":"npm","purl":"pkg:npm/react-router"},"ranges":[{"type":"SEMVER","events":[{"introduced":"7.0.0"},{"fixed":"7.15.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-8x6r-g9mw-2r78/GHSA-8x6r-g9mw-2r78.json"}},{"package":{"name":"@remix-run/server-runtime","ecosystem":"npm","purl":"pkg:npm/%40remix-run/server-runtime"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2.10.0"},{"fixed":"2.17.5"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-8x6r-g9mw-2r78/GHSA-8x6r-g9mw-2r78.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}