Do you want to allow this page to open “News”? NO! I DO NOT!

Macs do not run IOS, only IOS devices (iPhones, iPads or iPods) run IOS. Macs run Mac OS, the most up to date version being 10.15.4. When posting a question, please be specific.

I would recommend you review your Safari Preferences, perhaps this advice letter will help you https://support.apple.com/guide/safari/websites-ibrwe2159f50/mac

FWIW. I can't reproduce the behavior. You could try creating a new user and see if it still happens. You could also test while in Safe Mode in case a third-party app is causing it.

How to use safe mode on your Mac - Apple Support

FWIW, I do not have a NEWS+ subscription if that has anything to do with the issue.

I do not have a NEWS+ subscription either, but I MIGHT have figured this out. The dialog has not shown up since I did this, but since I'm not sure when it shows up this is hardly a definitive test.

Open System Preferences

Click on Apple ID in the upper right (next to family sharing)

In the "apps on this mac are using iCloud" scroll down to News and UNcheck it (I don't know how it got turned on to begin with). I answered the dialog that will pop up asking if you want to save or delete the News content on your Mac, I selected delete. Once that was done the "do you want to allow this page to open "news.app" ?" has not appeared when I go to CNN. But again maybe I just have not waited long enough.

Did the advice letter help?

I have the same issue. I have turned everything for CNN off in safari's web page preferences to no avail. It's driving me crazy.

Mine was never enabled in the first place so you may have found the culprit. 😎

Glad it's sorted. It makes sense it didn't occur in a new user. A new user would have a new Safari history.

Confirmed that turning off iCloud use for the news.app does not fix the issue (it took till the next morning to show up again but it did show up).

I'm trying "clear history".

Clearing history does work, until you've opened a tab for CNN four times or so, then it starts all over.

And today, it has stopped asking all on its own. Did the OS finally figure out after clicking Cancel for the 100th time that, yes, I really don't want to open CNN in the News app?