CVE-2026-42498

Name of the Vulnerable Software and Affected Versions Apache Tomcat versions 11.0.0-M1 through 11.0.21 Apache Tomcat versions 10.1.0-M1 through 10.1.54 Apache Tomcat versions 9.0.2 through 9.0.117 Apache Tomcat versions 8.5.24 through 8.5.100 Apache Tomcat versions 7.0.83 through 7.0.109

Description An issue exists where the HTTP Authentication Header is exposed to unexpected hosts during WebSocket authentication.

Recommendations Upgrade versions 11.0.0-M1 through 11.0.21 to 11.0.22. Upgrade versions 10.1.0-M1 through 10.1.54 to 10.1.55. Upgrade versions 9.0.2 through 9.0.117 to 9.0.118.