Hungarian Prime Minister Viktor Orbán has launched an investigation into a data leak connected to an app used by the leading opposition party, Tisza. According to media reports, the personal data of around 200,000 users was leaked over the weekend from the Tisza Világ app, which the party uses to conduct its primaries ahead of the 2026 parliamentary election.
‘What we know for certain at this point is that this data was collected by the Tisza Party. I have convened the members of the government responsible for national security, and based on the analysis of the database, we have established that Ukrainian individuals were also involved in handling the data,’ Orbán said in a post on Facebook on Monday. He added that transferring personal data into Ukrainian hands poses a serious national security risk, and therefore, the government has ordered an immediate investigation into the details of the case.
Hungarian Minister of Foreign Affairs and Trade Péter Szijjártó, speaking on Monday, called the incident ‘one of the biggest scandals in modern Hungarian political history.’ ‘This party entered the personal data of its own activists into a database created with Ukrainian participation. And what happened now? This very database, created with Ukrainian participation, was partly made public, which means it is also in Ukrainian hands,’ the minister explained.
Szijjártó warned that the authorities of a country at war might now have access to highly personal information belonging to Hungarian citizens. ‘With this, hundreds of thousands of Hungarian citizens have been put in extraordinary danger, and Hungary’s sovereignty has been put in extraordinary danger. Because this means that a country at war can directly obtain a means of influence over another country’s sovereignty,’ he said.
‘By allowing the most intimate, most sensitive personal data of 200,000 Hungarian citizens to fall into Ukrainian hands—to the hands of a country at war—an enormous security risk has been created, both for the individuals concerned and for the nation as a whole. I believe that no one yet fully grasps the gravity of this situation,’ Szijjártó concluded.
‘Hungarian opposition leader Péter Magyar accused Russian hackers of the breach’
The database containing the personal information of approximately 200,000 users was uploaded to the website LeakBase.la on 31 October. The dataset includes names, usernames, email addresses, home addresses, and phone numbers, along with various other details. This was not the first leak related to the Tisza Világ app: around 20,000 names had already appeared a month earlier on the same site.
Hungarian opposition leader Péter Magyar accused Russian hackers of the breach, stating that the goal of the operation was to instill fear among Tisza supporters. According to him, what is taking place amounts to a hostile act of listing and an attempt to incapacitize the party.
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