Security Alert (A26-07-04): Multiple Vulnerabilities in Apache Tomcat

Description:

The Apache Software Foundation released security updates to address multiple vulnerabilities in Apache Tomcat. A remote attacker could exploit the vulnerabilities by sending a specially crafted request to the affected systems.

Affected Systems:

• Apache Tomcat version 9.0.0.M1 to 9.0.118
• Apache Tomcat version 10.1.0-M1 to 10.1.55
• Apache Tomcat version 11.0.0-M1 to 11.0.22

For detailed information of the affected systems, please refer to the corresponding security advisories at vendor's website.

Impact:

Successful exploitation of the vulnerabilities could lead to elevation of privilege or security restriction bypass on an affected system.

Recommendation:

The Apache Software Foundation has released new versions of the software to address the issues and they can be downloaded at the following URLs:
https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.119
https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.56
https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.23

More Information:

• https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.119
• https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.56
• https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.23
• https://www.hkcert.org/security-bulletin/apache-tomcat-multiple-vulnerabilities_20260702
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-50229
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-53404
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-53434
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-55276
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-55955 (to CVE-2026-55956)