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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 tomcat-admin-webappsUpgrade tomcat-el-3.0-apiUpgrade tomcat-jsp-2.3-apiUpgrade tomcatUpgrade tomcat-webappsUpgrade tomcat-lib | Oct 11, 2026 | Sep 17, 2026 |
| Amazon Linux Ami 2 | — | Upgrade tomcat-servlet-4.0-apiUpgrade tomcat-libUpgrade tomcat-jsvcUpgrade tomcat-docs-webappUpgrade tomcat-admin-webappsUpgrade tomcat-el-3.0-apiUpgrade tomcat-webappsUpgrade tomcatUpgrade tomcat-jsp-2.3-api | May 20, 2026 | May 20, 2026 |
| Apache Tomcat | — | Upgrade Apache Tomcat to 10.1.53Upgrade Apache Tomcat to 11.0.20Upgrade Apache Tomcat to the latest available versionUpgrade Apache Tomcat to 9.0.116 | Apr 10, 2026 | Apr 9, 2026 |
| Debian | — | Upgrade tomcat11Upgrade tomcat9Upgrade tomcat10 | Apr 13, 2026 | Apr 13, 2026 |
| Redhat_linux | — | Upgrade tomcat-jsp-2.3-apiUpgrade tomcatUpgrade tomcat-el-3.0-apiUpgrade tomcat9-admin-webappsUpgrade tomcat9-jsp-2.3-apiUpgrade jws6-tomcatUpgrade jws6-tomcat-libUpgrade tomcat9-el-3.0-apiUpgrade tomcat-admin-webappsUpgrade jws6-tomcat-docs-webappUpgrade tomcat-docs-webappUpgrade tomcat-servlet-4.0-apiUpgrade jws6-tomcat-webappsUpgrade tomcat9-docs-webappUpgrade tomcat9-libUpgrade jws6-tomcat-admin-webappsUpgrade tomcat-webappsUpgrade tomcat9-webappsUpgrade jws6-tomcat-servlet-6.0-apiNo solution existsUpgrade jws6-tomcat-jsp-3.1-apiUpgrade jws6-tomcat-selinuxUpgrade tomcat9-servlet-4.0-apiUpgrade jws6-tomcat-el-5.0-apiUpgrade tomcat9Upgrade jws6-tomcat-javadocUpgrade tomcat-lib | May 28, 2026 | Apr 9, 2026 |
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