React Router allows a DoS via cache poisoning by forcing SPA mode
26Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 20%
exploitation probability
20%top 3% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
remix-run · react-routerReferences
https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08a69868a/packages/react-router/lib/server-runtime/server.ts#L407https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b354b70111https://github.com/remix-run/react-router/security/advisories/GHSA-f46r-rw29-r322