QR code images in macOS are silently executed in the background hours/days later
Other thread on this: https://news.ycombinator.com/item?id=33095608My comment from there:I'll be interested to see if anyone else can reproduce this. I created a request bin [0], then created a QR code pointing at it, then downloaded that QR code. I'm not sure how often this "image scanning" is supposed to occur but just downloading it didn't cause a hit nor did the 10min I waited, nor did using QuickLook, nor opening it Preview, nor scanning it with my iPhone, the only thing that caused a request was clicking on the detected link in my iPhone camera app.
Obviously if this is a background daemon that runs periodically then my test wouldn't catch it (unless I got "lucky") and for a longer-term test I'd probably want to use something other than request bin. That said request bin says it keeps bins for 48 hours so that might be enough time.[0] https://requestbin.io/