I have noticed that when saving projects using AE 2017 (14.2.0.198) and OS X 10.11.6, the project file permissions get set to -rw-rw----, so only my current user and anybody in the 'staff' group have read/write permissions, while anybody else gets no access.
In AE CC 2015.3, the default file permissions are set to -rw-rw-rw-. In Photoshop CC 2017.1, the default file permissions are set to -rw-r--r--@. This is also the same permissions that OS X's TextEdit application uses. AE CC 2014.2 has the same minus the @ symbol (so no extended attributes).
I am currently signed in as an Administrator user. The fact that default permissions have changed between versions isn't that big a deal, but the current permissions actually do matter to me - I need network users to access these project files, and currently I have to save my project and manually change permissions afterwards in order for that to work.
A bug report has already been filed since I didn't know how else to frame it. Does anybody know if default permissions can be edited, or if there is a workaround for this issue?