{"id":"CVE-2025-43864","summary":"React Router allows a DoS via cache poisoning by forcing SPA mode","details":"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.","aliases":["GHSA-f46r-rw29-r322"],"modified":"2026-04-10T05:26:42.423274Z","published":"2025-04-25T00:18:16.058Z","database_specific":{"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/43xxx/CVE-2025-43864.json","cwe_ids":["CWE-755"]},"references":[{"type":"WEB","url":"https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08a69868a/packages/react-router/lib/server-runtime/server.ts#L407"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/43xxx/CVE-2025-43864.json"},{"type":"ADVISORY","url":"https://github.com/remix-run/react-router/security/advisories/GHSA-f46r-rw29-r322"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-43864"},{"type":"FIX","url":"https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b354b70111"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/remix-run/react-router","events":[{"introduced":"4b5793dc97dd8f72c56b761427a371f102858434"},{"fixed":"5819e0c45df69a0b4ac582497e5adb1c089385b5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-43864.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"}]}