We have released version 2.6.1 of the Snowplow collector
This patch release bumps several dependency libraries to their latest versions, to stay on top of potential security vulnerabilities. Being a webserver, the collector is the part of a Snowplow pipeline that is most accessible to any attempted attack, so it is particularly important to address vulnerabilities when we they arise.
If you are already using a recent version of the collector, then upgrading is as simple pulling the most recent docker image
docker pull snowplow/scala-stream-collector-kinesis:2.6.1 docker pull snowplow/scala-stream-collector-pubsub:2.6.1 docker pull snowplow/scala-stream-collector-kafka:2.6.1
The Snowplow docs site has a full guide to setting up and running the collector.