Telegram Security Incidents, Data Leaks and Privacy Controversies: A Timeline (2016-2026)
A sourced timeline of 13 Telegram security incidents, flaws and privacy controversies from 2016 to November 2026: the 2016 Iranian account takeovers, Hong Kong contact matching, the 42 million record leak from unofficial forks, MTProto attacks, EvilVideo, Durov's arrest and data sharing with authorities, and 2026 app vulnerabilities.