Apache Tomcat full changelog
Apache Tomcat 11.0.21
released Apr 4, 2026 (New Release)
Fix a bug in the non-blocking flushing code for NIO+TLS that meant that a response may not have been fully written until the connection was closed. Pull request 966 provided by Phil Clay.
Improved HTTP/2 error handling
Better error handling for the EncryptInterceptor
Improved HTTP/2 error handling
Better error handling for the EncryptInterceptor
Apache Tomcat 11.0.20
released Mar 20, 2026 (New Release)
Relax HTTP/2 header validation and respond to invalid requests with a stream reset or a 400 response as appropriate rather then with a connection reset.
Fix bug 69964: Respect the configured cipher order, which was no longer respected following the addition of TLS 1.3 specific cipher configuration. TLS 1.3 ciphers will always be first in the list.
Update Tomcat Native to 2.0.14 and increase the recommended version to 2.0.14.
Fix bug 69964: Respect the configured cipher order, which was no longer respected following the addition of TLS 1.3 specific cipher configuration. TLS 1.3 ciphers will always be first in the list.
Update Tomcat Native to 2.0.14 and increase the recommended version to 2.0.14.
Apache Tomcat 11.0.18
released Jan 28, 2026 (New Release)
Fix regression in request-end time in access logging which would instead log the request start-time.
Fix regression where ClassLoader.getResource().getContent() failed under certain circumstances.
Update Tomcat Native to 2.0.12 and increase the minimum version to 2.0.12 / 1.3.4.
Expand OCSP support to JSSE-based connections and expand OCSP configuration options.
Update Commons Daemon to 1.5.1.
Fix regression where ClassLoader.getResource().getContent() failed under certain circumstances.
Update Tomcat Native to 2.0.12 and increase the minimum version to 2.0.12 / 1.3.4.
Expand OCSP support to JSSE-based connections and expand OCSP configuration options.
Update Commons Daemon to 1.5.1.
Apache Tomcat 11.0.15
released Dec 9, 2025 (New Release)
Add strictSNI attribute on the Connector to allow matching the SSLHostConfig configuration associated with the SNI host name to the SSLHostConfig configuration matched from the HTTP protocol host name. Non matching configurations will cause the request to be rejected. The attribute default value is true, enabling the matching.
Correct a regression introduced in 11.0.11 that broke some clustering configurations.
Update Commons Daemon to 1.5.0.
Correct a regression introduced in 11.0.11 that broke some clustering configurations.
Update Commons Daemon to 1.5.0.
Apache Tomcat 11.0.13
released Oct 14, 2025 (New Release)
Fix copy/paste refactoring errors in 11.0.12 that meant DELETE requests received via the AJP connector were processed as OPTIONS requests and PROPFIND requests were processed as TRACE.
Add CIDR support to the RemoteIp[Filter|Valve] and deprecate the RemoteAddr[Filter|Valve] in favour of the RemoteCIDR[Filter|Valve]
Log warnings when the SSO configuration does not comply with the documentation.
Add CIDR support to the RemoteIp[Filter|Valve] and deprecate the RemoteAddr[Filter|Valve] in favour of the RemoteCIDR[Filter|Valve]
Log warnings when the SSO configuration does not comply with the documentation.
Apache Tomcat 11.0.12
released Oct 7, 2025 (New Release)
The notable changes in this release are:
Add specific certificate selection code for TLS 1.3 supporting post quantum cryptography. Certificates defined with type MLDSA will be selected depending on the TLS client hello.
Add groups attribute on SSLHostConfig allowing to restrict which groups can be enabled on the SSL engine.
Store HTTP/1.1 request headers using the original case for the header name rather than forcing it to lower case.
Add specific certificate selection code for TLS 1.3 supporting post quantum cryptography. Certificates defined with type MLDSA will be selected depending on the TLS client hello.
Add groups attribute on SSLHostConfig allowing to restrict which groups can be enabled on the SSL engine.
Store HTTP/1.1 request headers using the original case for the header name rather than forcing it to lower case.
Apache Tomcat 11.0.11
released Oct 6, 2025 (New Release)
Correct a regression in the fix for 69781 that broke FileStore
Change the digest used to calculate strong ETags (if enabled) for the default Servlet from SHA-1 to SHA-256
Add hybrid PQC support to OpenSSL-based connectors
Change the digest used to calculate strong ETags (if enabled) for the default Servlet from SHA-1 to SHA-256
Add hybrid PQC support to OpenSSL-based connectors
Apache Tomcat 10.1.25
released Jun 20, 2024 (New Release)
Apache Tomcat 10.1.24
released May 20, 2024 (New Release)
Apache Tomcat 10.1.23
released Apr 24, 2024 (New Release)
Apache Tomcat for Windows 7 - free download notice
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