We are extremely pleased to announce that Eclipse Vert.x version 4.5.18 has been released.

Since the release of Vert.x 4.5.17, quite a few bugs have been reported. We would like to thank you all for reporting these issues.

In addition, CVE-2025-8671 and CVE-2025-55163 have been disclosed, affecting HTTP/2 servers. Vert.x upgrades to Netty 4.1.124.Final which provides protection for this DDOS.

The 4.5.18 release notes can be found on the wiki.

You can bootstrap a Vert.x 4 project using start.vertx.io.

The release artifacts have been deployed to Maven Central.

The Vert.x 4 eventbus JavaScript client library is now available in a single location and it now usable standalone or it can easily be integrated with any frontend build tool.

The Vert.x distribution is available from SDKMan and our HomeBrew TAP.

Vert.x follows a 2 years policy after a major release, as consequence Vert.x remains supported until April 2027 and get bug fixes, you should consider upgrading your application to Vert.x 5.

That’s it! Happy coding and see you soon on our user or dev channels.