Update Signal and pay attention when joining groups:
https://www.wired.com/story/russia-signal-qr-code-phishing-attack/
👉 No, Signal has not been compromised
👉 No, Signal encryption has not been broken
👉 No, there is no back-door in Signal
You should continue using Signal. The update is responding to a sophisticated, state-level attack targeting specific groups.
Unless you are a high-value target, you are almost certainly never going to see this in the wild.
If you know you are a high-value target, ask your support.
A Signal Update Fends Off a Phishing Technique Used in Russian Espionage
Google warns that hackers tied to Russia are tricking Ukrainian soldiers with fake QR codes for Signal group invites that let spies steal their messages. Signal has pushed out new safeguards.Andy Greenberg (WIRED)