{"id":"CVE-2026-42342","state":"PUBLISHED","title":"React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint","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.","publishedAt":"2026-06-02T18:23:02.765Z","updatedAt":"2026-06-03T13:52:43.400Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["remix-run react-router","remix-run @remix-run/server-runtime"],"affected":[{"vendor":"remix-run","product":"react-router","versions":[{"version":">= 7.0.0, < 7.15.0","status":"affected"}]},{"vendor":"remix-run","product":"@remix-run/server-runtime","versions":[{"version":">= 2.10.0, < 2.17.5","status":"affected"}]}],"references":["https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/42xxx/CVE-2026-42342.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42342","state":"PUBLISHED","datePublished":"2026-06-02T18:23:02.765Z","dateUpdated":"2026-06-03T13:52:43.400Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-26T13:26:14.514Z"},"containers":{"cna":{"title":"React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"remix-run","product":"react-router","versions":[{"version":">= 7.0.0, < 7.15.0","status":"affected"}]},{"vendor":"remix-run","product":"@remix-run/server-runtime","versions":[{"version":">= 2.10.0, < 2.17.5","status":"affected"}]}],"references":[{"url":"https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78","name":"https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-02T18:23:02.765Z"},"source":{"advisory":"GHSA-8x6r-g9mw-2r78","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-03T13:52:31.015400Z","id":"CVE-2026-42342","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-03T13:52:43.400Z"}}]}}}