Overnight Notification Center message, "bash was prevented from modifying apps"

Wake up this morning and see this very concerning sticky message in Notification Center:

bash was prevented from modifying apps

It didn't say what parent program called `bash' so I clicked on the N.C. message to see if there was more information and it just disappeared (as if I had chosen to click on the X to clear the message-I wish I had taken a screenshot first). I have already sent in a request to Apple for them to give more detailed information on events like this. If there is an existing threat on a device it needs to be removed.

The only thing that I know of that happened overnight was a SPAM email from "Norton Antivirus" came into my Gmail Inbox that wasn't filtered as SPAM and macOS announced it in Notification Center. I don't see anything funny in the RAW data of the email - and reported it to spamcop.

Is it possible that a malicious email could contain html code that runs when it's announced via macOS Notification Center?

Overnight Notification Center message, "bash was prevented from modifying apps"
 
 
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