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Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the number guess example for Apache Tomcat.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected.
Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade tomcat-servlet-4.0-apiUpgrade tomcat-webappsUpgrade tomcat-docs-webappUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-admin-webappsUpgrade tomcat-libUpgrade tomcatUpgrade tomcat-el-3.0-api | Oct 11, 2026 | Sep 17, 2026 |
| Amazon Linux Ami 2 | — | Upgrade tomcat-jsvcUpgrade tomcat-libUpgrade tomcat-webappsUpgrade tomcat-servlet-4.0-apiUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-el-3.0-apiUpgrade tomcat-admin-webappsUpgrade tomcatUpgrade tomcat-docs-webapp | Jul 21, 2026 | Jul 21, 2026 |
| Apache Tomcat | — | Upgrade Apache Tomcat to 9.0.119Upgrade Apache Tomcat to 10.1.56Upgrade Apache Tomcat to the latest available versionUpgrade Apache Tomcat to 11.0.23 | Jun 30, 2026 | Jun 29, 2026 |
| Debian | — | Upgrade tomcat9 | Jul 1, 2026 | Jul 1, 2026 |
| Redhat_linux | — | Upgrade tomcat-webappsNo solution existsUpgrade tomcat9-admin-webappsUpgrade tomcat-jsp-2.3-apiUpgrade tomcat9-docs-webappUpgrade tomcat-admin-webappsUpgrade tomcat9-el-3.0-apiUpgrade tomcat-servlet-4.0-apiUpgrade tomcat-docs-webappUpgrade tomcat-libUpgrade tomcat9-jsp-2.3-apiUpgrade tomcat9-servlet-4.0-apiUpgrade tomcat-el-3.0-apiUpgrade tomcatUpgrade tomcat9-libUpgrade tomcat9Upgrade tomcat9-webapps | Jul 17, 2026 | Jun 29, 2026 |
| Ubuntu | — | Upgrade libtomcat8-embed-java (Ubuntu Pro)Upgrade libtomcat8-java (Ubuntu Pro)Upgrade tomcat8-examples (Ubuntu Pro) | Jul 20, 2026 | Jul 15, 2026 |
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