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Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.40 through 9.0.116.
Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117 , which fix the issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade tomcat-admin-webappsUpgrade tomcat-docs-webappUpgrade tomcat-el-3.0-apiUpgrade tomcatUpgrade tomcat-servlet-4.0-apiUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-webappsUpgrade tomcat-lib | Oct 11, 2026 | Sep 17, 2026 |
| Amazon Linux Ami 2 | — | Upgrade tomcat-servlet-4.0-apiUpgrade tomcat-jsvcUpgrade tomcatUpgrade tomcat-docs-webappUpgrade tomcat-libUpgrade tomcat-webappsUpgrade tomcat-el-3.0-apiUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-admin-webapps | May 20, 2026 | May 20, 2026 |
| Apache Tomcat | — | Upgrade Apache Tomcat to 9.0.117Upgrade Apache Tomcat to the latest available versionUpgrade Apache Tomcat to 11.0.21Upgrade Apache Tomcat to 10.1.54 | Apr 10, 2026 | Apr 9, 2026 |
| Atlassian Jira | — | Upgrade to the latest version of Atlassian JIRA | May 20, 2026 | May 19, 2026 |
| Debian | — | Upgrade tomcat11Upgrade tomcat9Upgrade tomcat10 | Apr 13, 2026 | Apr 13, 2026 |
| Redhat_linux | — | Upgrade tomcat-docs-webappUpgrade tomcat9-webappsUpgrade jws6-tomcat-jsp-3.1-apiUpgrade tomcat9-el-3.0-apiUpgrade tomcat-admin-webappsUpgrade tomcat-el-3.0-apiUpgrade jws6-tomcat-selinuxUpgrade tomcat-webappsUpgrade jws6-tomcat-el-5.0-apiUpgrade jws6-tomcat-webappsUpgrade tomcat9-docs-webappUpgrade jws6-tomcat-libUpgrade tomcatNo solution existsUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-libUpgrade jws6-tomcat-servlet-6.0-apiUpgrade tomcat9-jsp-2.3-apiUpgrade tomcat-servlet-4.0-apiUpgrade tomcat9-servlet-4.0-apiUpgrade tomcat9Upgrade jws6-tomcat-docs-webappUpgrade tomcat9-admin-webappsUpgrade jws6-tomcat-javadocUpgrade jws6-tomcat-admin-webappsUpgrade tomcat9-libUpgrade jws6-tomcat | May 28, 2026 | Apr 9, 2026 |
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