The flaw was discovered by software developer Abraham Masri, who shared a link which can be used to crash the app on social media.
This redirects the Messages app to a page stored on Github, a hosting service for computer code, which exploits the bug.
Reported effects include freezing, crashes, restarts and resprings, a process which takes about 10 seconds and returns you to the Lock Screen.
How to fix it here: Tom's Guide
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