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⚠️ Important: Strimzi 0.45 supports only Kubernetes 1.25 and newer. Kubernetes 1.23 and 1.24 are not supported anymore.

⚠️ Important: Strimzi 0.45.2 is the last patch release from the 0.45.x release branch, there will be no other patch release after this one.

⚠️ Important: For upgrades to Strimzi 0.46 and above, pay attention to the Upgrade to Strimzi 0.46-0.51 section of this release page.

Main changes since 0.45.1

This release contains the following new features and improvements:

  • Dependency updates and CVE fixes
  • Add support for Kafka 3.9.2

All changes can be found under the 0.45.2 milestone.

Watch out also for some notable changes, deprecations, and removals:

Upgrade to Strimzi 0.46-0.51

Upgrade to Strimzi 0.46-0.51 is possible, however, if you are currently using Kafka 3.9.2, the operator will fail after the upgrade with an error similar to this:

2026-03-07 17:16:15 WARN  AbstractOperator:567 - Reconciliation #15(watch) Kafka(myproject/my-cluster): Failed to reconcile
io.strimzi.operator.cluster.model.KafkaUpgradeException: Unsupported Kafka.spec.kafka.version: 3.9.2. Supported versions are: [4.1.1, 4.2.0, 4.0.0, 4.0.1, 4.1.0, 3.0.0, 3.2.3, 3.3.2, 3.4.1, 3.5.0, 3.5.1, 3.6.0, 3.5.2, 3.6.1, 3.7.0, 3.6.2, 3.7.1, 3.8.0, 3.0.1, 3.1.0, 3.1.1, 3.2.0, 3.1.2, 3.2.1, 3.3.1, 3.4.0, 2.1.0, 3.8.1, 3.9.0, 3.9.1, 2.6.2, 2.7.1, 2.8.0, 2.8.1, 2.5.1, 2.6.0, 2.6.1, 2.7.0, 2.3.1, 2.4.0, 2.4.1, 2.5.0, 2.1.1, 2.2.0, 2.2.1, 2.3.0]
        at io.strimzi.operator.cluster.model.KafkaVersion$Lookup.version(KafkaVersion.java:148)
        at io.strimzi.operator.cluster.operator.assembly.KRaftVersionChangeCreator.detectToAndFromVersions(KRaftVersionChangeCreator.java:157)
        at io.vertx.core.impl.future.Composition.complete(Composition.java:40)
        at io.vertx.core.impl.future.FutureBase.lambda$emitResult$0(FutureBase.java:59)
        at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:148)
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:141)
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:535)
        at io.netty.channel.SingleThreadIoEventLoop.run(SingleThreadIoEventLoop.java:201)
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:1195)
        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.base/java.lang.Thread.run(Thread.java:1583)

When that happens, use the following command to update the Kafka version annotation on the Kafka Pods:

kubectl annotate pod -l strimzi.io/kind=Kafka,strimzi.io/component-type=kafka,strimzi.io/cluster=CLUSTER_NAME strimzi.io/kafka-version=3.9.1 --overwrite -n NAMESPACE_NAME

Where CLUSTER_NAME is the name of your cluster and NAMESPACE_NAME is its namespace.

Once you change the annotation, the upgrade will proceed.

[!IMPORTANT] Upgrading directly to Strimzi 1.0.0 or newer will not be supported.

Upgrading from Strimzi 0.45.1

See the documentation for upgrade instructions.

Upgrading from Strimzi 0.22 or earlier

Direct upgrade from Strimzi 0.22 or earlier is not supported anymore! You have to upgrade first to one of the previous versions of Strimzi. You will also need to convert the CRD resources. For more details, see the documentation.

Container images

The following container images are part of this release:

Name Image
Operators quay.io/strimzi/operator@sha256:fbf54c39a3b066be84639dc88a3c14d2d90ff30618578a16080fe16375d7c641
Apache Kafka 3.8.0 quay.io/strimzi/kafka@sha256:24f83460f4a904a0511c81e981ba27d72229cef985b222e983dd7eb7a2f49d0f
Apache Kafka 3.8.1 quay.io/strimzi/kafka@sha256:4f52fd8232e61385f928539f6e2aa2d23c9ba9ce18390ee735f55f9ae110ecdc
Apache Kafka 3.9.0 quay.io/strimzi/kafka@sha256:50d6b41639435813d6e5458d100c619c91d8345f7868f7cd86330d2a0817922b
Apache Kafka 3.9.1 quay.io/strimzi/kafka@sha256:7d25fde4ae8c5f0611a03a1c150a7d9d2e81d287a96e2cac8e93bb657c599cb6
Apache Kafka 3.9.2 quay.io/strimzi/kafka@sha256:5d96fe7c68db643f4916146176a7587aaf9f91c32fa9da7300f013e3e79298d8
Strimzi Bridge quay.io/strimzi/kafka-bridge@sha256:c462441a966f0732855e684b4840563bfad45391345c9511fa49e1630ba9c3e3
Kaniko executor quay.io/strimzi/kaniko-executor@sha256:ef1a39c363e145041d80103c3c12da9429ce06cf21dff6fb1fb75d0c0ed9c35b
Maven Builder quay.io/strimzi/maven-builder@sha256:a18ce42d8b882510ec848b3542b1a213707b3aa1ad160cdc95828c26a740725e

New Contributors

What's Changed

Source: README.md, updated 2026-03-06