A serious security vulnerability has been found in the Ruby on Rails framework. This exploit affects nearly all applications running Rails and a patch has been made available. Rails developers can get a full list of all your affected Heroku applications by following instructions here. Please address this security vulnerability by immediately upgrading your affected apps to any of the safe versions
![Rails Security Vulnerability](https://cdn-ak-scissors.b.st-hatena.com/image/square/a1b2a24fb8bb6b5daa830ba9854ce4ba0af7b021/height=288;version=1;width=512/https%3A%2F%2Fwww.herokucdn.com%2Fimages%2Fog.png)