A vulnerability in Google’s Titan Security Key dongles could allow an attacker to masquerade as a Bluetooth keyboard or mouse. Microsoft researchers discovered a potentially serious vulnerability in the Bluetooth-supported version of Google’s key. Google has announced to offer a free replacement for the affected Titan Security Keys. Google recommends affected users to continue using their existing keys until they get a replacement. The vulnerability only affects the Bluetooth Low Energy pairing protocol and not the cryptographic security of the key itself, Google recommends users to use the Bluetooth key.
Source: https://thehackernews.com/2019/05/google-titan-security-key.html