Apache Tomcat^®

The Apache Tomcat^® software is an open source implementation of the Jakarta Servlet, Jakarta Server Pages, Jakarta Expression Language, Jakarta WebSocket, Jakarta Annotations and Jakarta Authentication specifications. These specifications are part of the Jakarta EE platform.

The Jakarta EE platform is the evolution of the Java EE platform. Tomcat 10 and later implement specifications developed as part of Jakarta EE. Tomcat 9 and earlier implement specifications developed as part of Java EE.

The Apache Tomcat software is developed in an open and participatory environment and released under the Apache License version 2. The Apache Tomcat project is intended to be a collaboration of the best-of-breed developers from around the world. We invite you to participate in this open development project. To learn more about getting involved, click here.

Apache Tomcat software powers numerous large-scale, mission-critical web applications across a diverse range of industries and organizations. Some of these users and their stories are listed on the PoweredBy wiki page.

Apache Tomcat, Tomcat, Apache, the Apache feather, and the Apache Tomcat project logo are trademarks of the Apache Software Foundation.

The Apache Tomcat Project is proud to announce the release of version 9.0.63 of Apache Tomcat. This release implements specifications that are part of the Java EE 8 platform. The notable changes compared to 9.0.62 include:

• Provide a property source that sources values from Kubernetes service bindings. Provided by Sumit Kulhadia and Gareth Evans.
• The root cause of the Linux kernel duplicate accept bug has been identified along with the version of the kernel that includes the fix. The error message displayed when this bug occurs has been updated to reflect this new information and to advise users to update to a version of the OS that uses kernel 5.10 or later. Thanks to Christopher Gual for the research into this issue.
• Update the packaged version of the Tomcat Native Library to 1.2.33 to pick up Windows binaries built with OpenSSL 1.1.1o.
• Add support for encrypted PKCS#1 formatted private keys when configuring the internal, in memory key store.

Full details of these changes, and all the other changes, are available in the Tomcat 9 changelog.

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The Apache Tomcat Project is proud to announce the release of version 10.0.20 of Apache Tomcat. This release implements specifications that are part of the Jakarta EE 9 platform.

Applications that run on Tomcat 9 and earlier will not run on Tomcat 10 without changes. Java EE based applications designed for Tomcat 9 and earlier may be placed in the $CATALINA_BASE/webapps-javaee directory and Tomcat will automatically convert them to Jakarta EE and copy them to the webapps directory. This conversion is performed using the Apache Tomcat migration tool for Jakarta EE tool which is also available as a separate download for off-line use.

The notable changes in this release are:

• Provide a property source that sources values from Kubernetes service bindings. Provided by Sumit Kulhadia and Gareth Evans.
• The root cause of the Linux kernel duplicate accept bug has been identified along with the version of the kernel that includes the fix. The error message displayed when this bug occurs has been updated to reflect this new information and to advise users to update to a version of the OS that uses kernel 5.10 or later. Thanks to Christopher Gual for the research into this issue.
• Update the packaged version of the Tomcat Native Library to 1.2.33 to pick up Windows binaries built with OpenSSL 1.1.1o.

Full details of these changes, and all the other changes, are available in the Tomcat 10 changelog.

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The Apache Tomcat Project is proud to announce the release of version 10.1.0-M15 of Apache Tomcat. This release is a milestone release and is targeted at Jakarta EE 10.

Applications that run on Tomcat 9 and earlier will not run on Tomcat 10 without changes. Java EE based applications designed for Tomcat 9 and earlier may be placed in the $CATALINA_BASE/webapps-javaee directory and Tomcat will automatically convert them to Jakarta EE and copy them to the webapps directory. This conversion is performed using the Apache Tomcat migration tool for Jakarta EE tool which is also available as a separate download for off-line use.

The notable changes in this release are:

• Provide a property source that sources values from Kubernetes service bindings. Provided by Sumit Kulhadia and Gareth Evans.
• The root cause of the Linux kernel duplicate accept bug has been identified along with the version of the kernel that includes the fix. The error message displayed when this bug occurs has been updated to reflect this new information and to advise users to update to a version of the OS that uses kernel 5.10 or later. Thanks to Christopher Gual for the research into this issue.
• Update the packaged version of the Tomcat Native Library to 1.2.33 to pick up Windows binaries built with OpenSSL 1.1.1o.

Full details of these changes, and all the other changes, are available in the Tomcat 10.1 (alpha) changelog.

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The Apache Tomcat Project is proud to announce the release of version 1.2.33 of Tomcat Native. The notable changes since 1.2.32 include:

• Windows binaries built with OpenSSL 1.1.1o.
• Fixing a potential crash when attempting to read the TLS session ID after a handshake failure.

Download | ChangeLog for 1.2.33

The Apache Tomcat Project is proud to announce the release of version 8.5.78 of Apache Tomcat. This release implements specifications that are part of the Java EE 7 platform. The notable changes compared to 8.5.77 include:

• Update the packaged version of the Tomcat Native Library to 1.2.32 to pick up Windows binaries built with OpenSSL 1.1.1n.
• Improve logging of unknown HTTP/2 settings frames. Pull request by Thomas Hoffmann.
• Add additional warnings if incompatible TLS configurations are used such as HTTP/2 with CLIENT-CERT authentication.
• Harden the class loader to provide a mitigation for CVE-2022-22965 a Spring Framework vulnerability.

Full details of these changes, and all the other changes, are available in the Tomcat 8 changelog.

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The Apache Tomcat Project is proud to announce the release of 1.0.0 of the Apache Tomcat Migration Tool for Jakarta EE. This release contains a number of bug fixes and improvements compared to version 0.2.0.

The notable changes in this release are:

• Further fixes to exclude javax.xml packages that are not part of Java EE from the migration.
• The class transformer now validates that the target classes in the Jakarta namespace exist in the runtime environment.

Full details of these changes, and all the other changes, are available in the changelog.

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The Apache Tomcat Project is proud to announce the release of version 1.2.48 of Apache Tomcat Connectors. This version fixes a number of bugs found in previous releases.

Download | ChangeLog for 1.2.48

The Apache Tomcat Project is proud to announce the release of version 1.2.5 of the Standard Taglib. This tag library provides Apache's implementation of the JSTL 1.2 specification.

Version 1.2.5 is a minor bug fix release reverting a change made in 1.2.1 where <c:import> modified the HTTP method during POST operations, and fixing an issues that resulted in an AccessControlException during startup unless permission was granted to read the accessExternalEntity property.

Please see the Taglibs section for more details.

Download | Changes

The Apache Tomcat team is pleased to announce the release of Tomcat Maven Plugin 2.2. Changelog available here.

The Apache Tomcat Maven Plugin provides goals to manipulate WAR projects within the Apache Tomcat servlet container.

The binaries are available from Maven repositories. You should specify the version in your project's plugin configuration:

<plugin>
  <groupId>org.apache.tomcat.maven</groupId>
  <artifactId>tomcat7-maven-plugin</artifactId>
  <version>2.2</version>
</plugin>

or

<plugin>
  <groupId>org.apache.tomcat.maven</groupId>
  <artifactId>tomcat6-maven-plugin</artifactId>
  <version>2.2</version>
</plugin>

See former announcements.