CVE-2026-43514

Versions Affected: Apache Tomcat 11.0.0-M1 to 11.0.21 Apache Tomcat 10.1.0-M1 to 10.1.54 Apache Tomcat 9.0.0.M1 to 9.0.117 Older, unsupported versions may also be affected

Description: The AJP secret was compared in non-constant time allowing an attacker on the local network to mount a timing attack to determine the AJP secret.

Mitigation: Users of the affected versions should apply one of the following mitigations:

• Upgrade to Apache Tomcat 11.0.22 or later
• Upgrade to Apache Tomcat 10.1.55 or later
• Upgrade to Apache Tomcat 9.0.118 or later