What we know about the alert app hack in Ukraine and Russia

As of November 2, 2026, Ukraine's air raid alert app was hacked, sending false alerts to residents about nuclear and chemical threats in Kyiv. The Ukrainian Air Force reported on Telegram that the public alert system had been compromised, leading to erroneous messages suggesting imminent dangers. Hours later, Russia’s emergencies ministry stated its own emergency warnings app experienced a "massive cyberattack," enabling attackers to disseminate false information to the public via their mobile application. While no casualties or major disruptions were immediately reported due to these alerts, they caused significant unease among residents in both countries. The incidents appear part of an escalating series of retaliatory cyber operations as tensions persist following the end of a lengthy truce between Russia and Ukraine.