Security Alert (A26-02-27): Vulnerability in Apache Tomcat

Description:

The Apache Software Foundation released security updates to address a vulnerability 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 9.0.83 to 9.0.114
• Apache Tomcat 10.1.0-M7 to 10.1.51
• Apache Tomcat 11.0.0-M1 to 11.0.17

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

Impact:

Successful exploitation of the vulnerability could lead to 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_9.0.115
https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.52
https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.18

More Information:

• https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.115
• https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.52
• https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.18
• https://www.hkcert.org/security-bulletin/apache-tomcat-security-restriction-bypass-vulnerability_20260220
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-24734