libpng security vulnerability

Hi!
I am using 4.12.5 and I am very close to my release date. Update Unreal is not really a good option for me since I am using third party plugins and last update was a disaster.

Is there any procedure to fix this problem for 4.12.5 launcher version?

My project is completely done in blueprints. I am a 3d artist, not a programmer and I’ve never used UE4 source from github.

Thank you very much!