MuleSoft-Anypoint Runtime Fabric: Custom Connector Publishing: Security-Driven Changes to Extension Model Resolution

Who needs to act

Customers who are planning to publish a new version of their Anypoint custom connector with changes to the supported Java version.

• Java connectors: add the Java version compatibility annotation to your connector class

• XML connectors: update mule-extensions-maven-plugin to 1.9.0+

You do NOT need to act if:

• Java connectors: if Java version compatibility is not changed

• Your connector already uses mule-java-extension-parent 1.9.0+ or mule-modules-parent 1.9.0+

• You are only deploying or running existing applications

Upgrade Instructions for Java Connectors with MuleSoft Anypoint Connectors

• Java connectors: add the @JavaVersionSupport annotation

Upgrade Instructions for Anypoint XML Connectors

Step 1: Update your Project Object Model (POM}:

<properties>

        <mule.extensions.maven.plugin.version>1.9.0</mule.extensions.maven.plugin.version>

</properties>

<plugin>

<groupId>org.mule.runtime.plugins</groupId>

<artifactId>mule-extensions-maven-plugin</artifactId>

<version>${mule.extensions.maven.plugin.version}</version>

<extensions>true</extensions>

</plugin>

Step 2: Ensure your CI/CD pipeline uses JDK 17+ for the build.

Step 3: Rebuild your connector:

mvn clean install

Step 4: Republish to Anypoint Exchange.

What happens if you don't upgrade

After August 1, 2026, publishing a new XML MuleSoft connector version that changes supported Java versions without the required Project Object Model (POM) updates will fail with an error:

Upgrade your mule.extensions.maven.plugin.version to 1.9.0+

Frequently Asked Questions

Will my running Mule applications break?

No. This change only affects the connector publishing process. All deployed Anypoint applications continue running without any impact.

Do I need to change my compiler source or target version for MuleSoft?

No. Your compiler can remain at Java 8 or 11. Only the JDK used in your build pipeline must be version 17+. Your connector will still be compatible with Java 8/11 runtimes.

What if my MuleSoft Anypoint connector was built with an older Mule SDK version and I don't want to upgrade yet?

Your existing published connector versions remain available and functional. You only need to upgrade when you want to publish a new version that changes Java compatibility. Until then, no action is required.

What should I do for the new XML connectors I'm working on with MuleSoft?

Use Mule Extension Plugin 1.9.0+ so your connector declares its supported Java version in mule-artifact.json at build time.