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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-755"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/43xxx/CVE-2025-43864.json"
}