CVE-2025-55668: Apache Tomcat

Medium severity, CVSS 6.5. EPSS: 0.9% chance of exploitation in the next 30 days.

Session Fixation vulnerability in Apache Tomcat via rewrite valve. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.7, from 10.1.0-M1 through 10.1.41, from 9.0.0.M1 through 9.0.105. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.8, 10.1.42 or 9.0.106, which fix the issue.

Affected products

• Apache Tomcat: from 9.0.1, before 9.0.106 (fixed in 9.0.106); from 10.0.0, before 10.1.42 (fixed in 10.1.42); from 11.0.0, before 11.0.8 (fixed in 11.0.8); version 9.0.0 only

Published 2025-08-13. Last modified 2026-06-17.