https://wccftech.com/breaking-safari-based-jailbreak-demoed-running-ios-12-beta-and-ios-11-4-on-iphone/

Even though Apple has recently highlighted several side effects of jailbreaking your iPhone, we’re still eager for CoolStar to release iOS 11.3.1 Electra jailbreak. While we’re in the phase of waiting, a Chinese security researcher and hacker has demoed a web-based jailbreak for iOS 11.4 and iOS 12 beta. The demo was shared on under the hacker’s Twitter handle SorryMyBad. So let’s dive in to see some more details on the matter and whether it will be released to the public.

The demo showed by the security researcher shows two iPhone models running side by side. One is running iOS 12 beta while the other is running iOS 11.4, which is the current software available for the public. The user is seen to visit a website and taps on the “jailbreak go” button to start the jailbreak process. The process also installs Cydia which is seen to work on iOS 11.4. The user used the Terminal command to confirm that iOS 12 was also jailbroken since Cydia is not compatible with iOS 12 yet.