According to Reuters, the 9GB of data were posted to Pastebin earlier, by a user named EMLEAKS. Even before the leak, there were postings teasing embarrassing data about Macron on 4Chan and, once again, Wikileaks has inserted itself into the mess. Given the silent period, it's hard to tell what impact, if any, this is having on the election until it's over, but given the events of the last year, a last-minute hacking and document leak is perhaps the least surprising campaign event possible.

Update: The French presidential election commission has also issued a statement, saying that it would hold a meeting later on Saturday, and reminding the media that publishing details could lead to criminal charges.