Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08
- https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b
- https://github.com/remix-run/react-router/security/advisories/GHSA-f46r-rw29-r32
FAQ
What is CVE-2025-43864?
CVE-2025-43864 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 applica...
How severe is CVE-2025-43864?
CVE-2025-43864 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-43864?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.