While still in public beta, iOS 10 has already been jailbroken!
A video posted online by iH8sn0w shows an iPhone running iOS 10 being jailbroken.
The last iOS version successfully jailbroken was iOS 9.0.2, using the Pangu Jailbreak. Some users managed to upgrade to iOS 9.1 using a tool released by Pangu in March.
Most of the world is still stuck with an older iOS version for fear that upgrading will overwrite the exploit and thus lead to a vanilla phone running the stock version of iOS.
From the video, it means the jail-breaking community which was assumed dead is still active.