American officials are trying to determine the source of the leak, which describes military drills and weapons placement, and how damaging it might be.
The leak of a pair of highly classified U.S. intelligence documents describing recent satellite images of Israeli military preparations for a potential strike on Iran offers a window into the intense American concerns about Israel’s plans. It also has U.S. officials working to understand the size of the improper disclosure.
The two documents were prepared in recent days by the National Geospatial-Intelligence Agency, which is responsible for analyzing images and information collected by American spy satellites. They began circulating on Friday on the Telegram app and were being discussed by largely pro-Iran accounts.
The documents, which offer interpretations of satellite imagery, provide insight into a potential strike by Israel on Iran in the coming days. Such a strike has been anticipated in retaliation for an Iranian assault earlier this month, which was itself a response to an Israeli attack.
The western articles are deliberately vague, so as to not get into legal trouble.
https://edition.cnn.com/2024/10/19/politics/us-israel-iran-intelligence-documents/index.html
But it is clear, that these leaks must have contained some more detailed information of how strong the strikes are planned to be, which weapon systems are planned to be used and so on.
For the “when” that is always flexible within reason.