Someone managed to jailbreak an AirTag already
(iMore iPhone)

What you need to know Someone has been able to hack an AirTag to give them control over its behavior. A hacker has been able to have an AirTag direct users to their own website via Lost Mode. That didn`t take long. Little more than a week after going on sale, Apple`s AirTag item track has already been jailbroken. First spotted by The 8-Bit. German researcher `stacksmashing` has been able to hack their way into an AirTag`s software, changing how it behaves when put into Lost Mode. German security researcher and YouTube content creator that goes by the name Stack Smashing tweeted today that they were successful in `breaking into the microcontroller of the AirTag.` They were then able to re-flash the microcontroller that enabled them to modify elements of AirTag`s software. With the new software in place the hacked AirTag presents a custom URL when scanned in Lost Mode. Normally, scanning a lost AirTag would redirect users to Apple`s website but this particular AirTag doesn`...