CVE-2025-43865

A flaw was found in React Router. This vulnerability allows an attacker to spoof pre-rendered data and potentially poison the cache via the X-React-Router-Prerender-Data header, enabling arbitrary content injection on the target page.

The severity of this vulnerability is rated Moderate, as it does not impact system availability. The effects are confined to the application layer, specifically involving data manipulation and potential cache poisoning, without compromising the underlying system stability.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.