Time to rebuild a ton of docker images:
If you used anything alpine based and used apk to install packages it's may compromised. You are advised to rebuild the image to fix it. If you use an image that is an intermediate image that is based on alpine linux, may wait a day until they are rebuild as well.
@sheogorath I just did a post on security in containers: https://penguindreams.org/blog/my-love-hate-relationship-with-docker-and-container-orchestration-systems/#security-in-containers