Security Issue with Bluetooth Low Energy (BLE) Titan Security Keys

We’ve become aware of an issue that affects the Bluetooth Low Energy (BLE) version of the Titan Security Key available in the U.S. and are providing users with the immediate steps they need to take to protect themselves and to receive a free replacement key. Security keys remain the strongest available protection against phishing; it is still safer to use a key that has this issue, rather than turning off security key-based two-step verification (2SV) on your Google Account or downgrading to less phishing-resistant methods (e.g. SMS codes or prompts sent to your device). If you want to minimize the remaining risk until you receive your replacement keys, you can perform the following additional steps:

On devices running iOS version 12.2 or earlier, we recommend using your affected security key in a private place where a potential attacker is not within close physical proximity (approximately 30 feet).

Source: security.googleblog.com