{"id":"CVE-2026-42342","summary":"React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint","details":"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 (`\u003cBrowserRouter\u003e`) or Data Mode (`createBrowserRouter/\u003cRouterProvider\u003e`). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5.","aliases":["GHSA-8x6r-g9mw-2r78"],"modified":"2026-06-26T04:10:08.560904130Z","published":"2026-06-02T18:23:02.765Z","related":["CGA-vrm5-w54c-82jf"],"database_specific":{"cwe_ids":["CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42342.json","cna_assigner":"GitHub_M","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"2.10.0"},{"fixed":"2.17.5"}]}]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42342.json"},{"type":"ADVISORY","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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/remix-run/react-router","events":[{"introduced":"e8e3b004d94a949372e77ce97a543bff5bc6fb89"},{"fixed":"97c8de79c38f107acd15f74d8295c7bf75894a5d"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE"],"extracted_events":[{"introduced":"7.0.0"},{"fixed":"7.15.0"},{"introduced":"7.0.0"},{"fixed":"7.15.0"}],"cpe":"cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*"}},{"type":"GIT","repo":"https://github.com/remix-run/remix","events":[{"introduced":"bc63b11b54b8ee4c514ddf7c590f3b4abd2d3854"},{"fixed":"8307662161457e1ad710bde0a52de7b7f800abbc"}],"database_specific":{"source":"CPE_RANGE","extracted_events":[{"introduced":"2.10.0"},{"fixed":"2.17.5"}],"cpe":"cpe:2.3:a:shopify:remix-run\\/server-runtime:*:*:*:*:*:node.js:*:*"}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42342.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}