The best way to receive any and all security announcements is to subscribe to the Akka security list.
The mailing list is very low traffic, and receives notifications only after security reports have been managed by the core team and fixes are publicly available.
We strongly encourage people to report such problems to our private security mailing list first, before disclosing them in a public forum.
Following best-practice, we strongly encourage anyone to report potential security vulnerabilities to firstname.lastname@example.org before disclosing them in a public forum like the mailing list or as a Github issue.
Reports to this email address will be handled by our security team, who will work together with you to ensure that a fix can be provided without delay.