Vice:

Apple has just released an emergency patch for the iPhone.

The company was forced to release a patch after it mistakenly made it easier for hackers to jailbreak up to date iPhones with the previous iOS release. In July, Apple released iOS 12.4, an update that reintroduced a bug that had been previously patched. Last week, iPhone hackers and jailbreakers realized Apple’s mistake and published a jailbreak for up to date iPhones—the first time in years it was possible to jailbreak iPhones on the latest version of iOS.

On Monday, Apple released iOS 12.4.1, which fixes the bug once again.

To quote my go-to security guy, Rich Mogull, “Patch now.”