
Critical vulnerability in Apache Tomcat must be patched, otherwise the server could go into DoS.
A critical security flaw has been discovered in Apache Tomcat’s HTTP/2 implementation. This vulnerability allows attackers to conduct malicious denial-of-service (DoS) attacks on web servers. The vulnerability, tracked under CVE-2025-48989 and dubbed the “Made You Reset” attack, affects several versions of the popular Java servlet container dj and poses significant risks to web applications worldwide. The security flaw, classified as severe, affects Apache Tomcat versions 11.0.0-M1 to 11.0.9, 10.1.0-M1 to 10.1.43, and 9.0.0.M1 to 9.0.107. Risk Factors Details Affected Products – Apache Tomcat 11.0.0-M1 to 11.0.9- Apache Tomcat 10.1.0-M1 to 10.1.43- Apache Tomcat 9.0.0.M1 to 9.0.107 – Older EOL releases (potentially affected)










