Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M1 through 9.0.115, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other, unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.20, 10.1.52 or 9.0.116, which fix the issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade tomcat-docs-webappUpgrade tomcat-servlet-4.0-apiUpgrade tomcatUpgrade tomcat-admin-webappsUpgrade tomcat-webappsUpgrade tomcat-libUpgrade tomcat-el-3.0-apiUpgrade tomcat-jsp-2.3-api | Oct 11, 2026 | Sep 17, 2026 |
| Amazon Linux Ami 2 | — | Upgrade tomcat-el-3.0-apiUpgrade tomcat-admin-webappsUpgrade tomcat-docs-webappUpgrade tomcat-webappsUpgrade tomcatUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-servlet-4.0-apiUpgrade tomcat-jsvcUpgrade tomcat-lib | May 20, 2026 | May 20, 2026 |
| Apache Tomcat | — | Upgrade Apache Tomcat to the latest available versionUpgrade Apache Tomcat to 9.0.116Upgrade Apache Tomcat to 10.1.53Upgrade Apache Tomcat to 11.0.20 | Apr 10, 2026 | Apr 9, 2026 |
| Debian | — | Upgrade tomcat10Upgrade tomcat9Upgrade tomcat11 | Apr 13, 2026 | Apr 13, 2026 |
| Redhat_linux | — | Upgrade jws6-tomcat-jsp-3.1-apiUpgrade tomcat9-libUpgrade jws6-tomcat-selinuxUpgrade tomcat-webappsUpgrade jws6-tomcat-servlet-6.0-apiNo solution existsUpgrade tomcat9Upgrade tomcat-libUpgrade tomcat9-webappsUpgrade tomcat9-servlet-4.0-apiUpgrade jws6-tomcat-el-5.0-apiUpgrade jws6-tomcat-javadocUpgrade jws6-tomcat-admin-webappsUpgrade tomcat-jsp-2.3-apiUpgrade tomcat-docs-webappUpgrade tomcat9-jsp-2.3-apiUpgrade jws6-tomcat-docs-webappUpgrade jws6-tomcat-webappsUpgrade tomcat9-docs-webappUpgrade tomcat9-el-3.0-apiUpgrade tomcat-servlet-4.0-apiUpgrade tomcat-admin-webappsUpgrade jws6-tomcatUpgrade jws6-tomcat-libUpgrade tomcat-el-3.0-apiUpgrade tomcatUpgrade tomcat9-admin-webapps | May 28, 2026 | Apr 9, 2026 |
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