A React Router flaw has been identified that exposes web apps to cache poisoning and WAF bypass attacks. The vulnerability affects the React Router, making it susceptible to cache poisoning and bypassing Web Application Firewalls (WAFs). This bypass exploit can potentially enable attackers to evade WAF protections and carry out malicious activities. WAF administrators and developers should be aware of this issue and take necessary steps to mitigate the risk. For more technical details, check out the blog post on this WAF bypass vulnerability.