Security Alert (A26-05-21): Multiple Vulnerabilities in Apache Tomcat

Description:

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

Affected Systems:

• Apache Tomcat 9.0.0-M1 to 9.0.117
• Apache Tomcat 10.1.0-M1 to 10.1.54
• Apache Tomcat 11.0.0-M1 to 11.0.21

For detailed information of the affected systems, please refer to the corresponding security advisory at software provider's website.

Impact:

Successful exploitation of the vulnerabilities could lead to denial of service 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_9.0.118
https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.55
https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.22

More Information:

• https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.118
• https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.55
• https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.22
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-41284
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-41293
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42498
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-43512 (to CVE-2026-43515)