According to Pangu Team, a Chinese hacker group, an "unpatchable" exploit has been uncovered for Apple's Secure Enclave, the co-processor that stores keys for Face ID, Touch ID, and passwords. This potentially puts the personal data and biometric information of millions of iPhone and iPad users at risk.
https://www.notebookcheck.net/Alarming-Unpatchable-exploit-in-Apple-s-Secure-Enclave-could-put-the-data-of-millions-of-users-at-risk-per-Chinese-hackers.483949.0.html