CVE-2025-43864 — React Router allows a DoS via cache poisoning by forcing SPA mode
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 …
Published: 2025-04-25 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7