More recently, a Signal chat record leaked, between US national security advisor Mike Waltz, US VP JD Vance and others, regarding the ongoing illegal assassinations in Yemen:

https://edition.cnn.com/2025/03/24/politics/yemen-strikes-jo...

and it didn't leak because of Signal's security, but because an Atlantic maganize journalist was added to the group chat by Waltz.

We are clear on OPSEC