{"id":"CVE-2025-43864","state":"PUBLISHED","title":"React Router allows a DoS via cache poisoning by forcing SPA mode","description":"React Router is a router for React. Starting in version 7.2.0 and prior to version 7.5.2, it is possible to force an application to switch to SPA mode by adding a header to the request. If the application uses SSR and is forced to switch to SPA, this causes an error that completely corrupts the page. If a cache system is in place, this allows the response containing the error to be cached, resulting in a cache poisoning that strongly impacts the availability of the application. This issue has been patched in version 7.5.2.","publishedAt":"2025-04-25T00:18:16.058Z","updatedAt":"2025-04-25T15:18:38.495Z","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"],"affected":[{"vendor":"remix-run","product":"react-router","versions":[{"version":">= 7.2.0, < 7.5.2","status":"affected"}]}],"references":["https://github.com/remix-run/react-router/security/advisories/GHSA-f46r-rw29-r322","https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b354b70111","https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08a69868a/packages/react-router/lib/server-runtime/server.ts#L407"],"weaknesses":["CWE-755"],"ingestedAt":"2026-10-29T20:09:17.366Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/43xxx/CVE-2025-43864.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-43864","state":"PUBLISHED","datePublished":"2025-04-25T00:18:16.058Z","dateUpdated":"2025-04-25T15:18:38.495Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-04-17T20:07:08.556Z"},"containers":{"cna":{"title":"React Router allows a DoS via cache poisoning by forcing SPA mode","descriptions":[{"lang":"en","value":"React Router is a router for React. Starting in version 7.2.0 and prior to version 7.5.2, it is possible to force an application to switch to SPA mode by adding a header to the request. If the application uses SSR and is forced to switch to SPA, this causes an error that completely corrupts the page. If a cache system is in place, this allows the response containing the error to be cached, resulting in a cache poisoning that strongly impacts the availability of the application. This issue has been patched in version 7.5.2."}],"affected":[{"vendor":"remix-run","product":"react-router","versions":[{"version":">= 7.2.0, < 7.5.2","status":"affected"}]}],"references":[{"url":"https://github.com/remix-run/react-router/security/advisories/GHSA-f46r-rw29-r322","name":"https://github.com/remix-run/react-router/security/advisories/GHSA-f46r-rw29-r322","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b354b70111","name":"https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b354b70111","tags":["x_refsource_MISC"]},{"url":"https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08a69868a/packages/react-router/lib/server-runtime/server.ts#L407","name":"https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08a69868a/packages/react-router/lib/server-runtime/server.ts#L407","tags":["x_refsource_MISC"]}],"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-755","lang":"en","description":"CWE-755: Improper Handling of Exceptional Conditions","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-04-25T00:18:16.058Z"},"source":{"advisory":"GHSA-f46r-rw29-r322","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-04-25T15:17:49.573437Z","id":"CVE-2025-43864","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-04-25T15:18:38.495Z"}}]}}}