Vulnerability in Remix-run React-router
CVE-2025-43864
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 t…
EPSS: 0.010 (76.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Remix-run React-router — versions >= 7.2.0, < 7.5.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/remix-run/react-router/security/advisories/GHSA-f46r-rw29-r322 (x_refsource_CONFIRM)
- https://github.com/remix-run/react-router/commit/c84302972a152d851cf5dd859ff332b354b70111 (x_refsource_MISC)
- https://github.com/remix-run/react-router/blob/e6c53a0130559b4a9bd47f9cf76ea5b08a69868a/packages/react-router/lib/server-runtime/server.ts#L407 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-43864?
- CVE-2025-43864 is a high-severity vulnerability in Remix-run React-router, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.5/10. Published 2025-04-25.
- How severe is CVE-2025-43864?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-43864 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.