What Happened
In 2026, Hungary experienced a politically sensitive data breach involving the Tisza Világ mobile app used by the opposition TISZA Party, in which personal data for about 200,000 supporters was leaked and published online. The incident centred on a database uploaded on 31 October 2026 to the leak site *LeakBase.la*, exposing names, usernames, email addresses, home addresses, phone numbers, and other profile details of registered users. Media reports and officials described it as one of the biggest political scandals in modern Hungarian history, with the government highlighting national‑security concerns after analysis indicated that Ukrainian individuals had handled the data, while opposition figures blamed Russian hackers and alleged a hostile intimidation campaign against TISZA supporters. The breach later led to secondary misuse of the leaked data, including an interactive map of opposition supporters and regulatory enforcement by Hungary’s data protection authority (NAIH) against media entities that linked to or amplified the leaked dataset.