Viktor Orbán has ordered an investigation into the Tisza party “data leak”, the prime minister revealed in a video posted on Monday. Orbán said that the data of 200,000 Hungarian citizens had been leaked online, so he summoned the government members responsible for national security affairs, where they determined, after analyzing the database, that Ukrainian individuals had also been involved in handling the data. “We also determined that personal data falling into Ukrainian hands poses a serious national security risk,” he said.

According to the pro-government Magyar Nemzet, a database containing the data of 200,000 Tisza sympathizers was leaked online over the weekend. According to the paper, several forum users and commenters claimed that they or their friends were in the leaked database.

On Monday, Péter Magyar said that there was no data leak, but rather a malicious attack. He said that their IT systems have been under attack for months by “international networks that are interested in keeping the Orbán government in power.” According to Magyar, “Orbán’s people are conducting a hostile list, the aim of which is to intimidate according to the communist system.”

“We cannot expect protection from the puppet authorities of the current government and the naming and holding accountable of those truly responsible (…) I undertake that after the regime change, those responsible for this matter, both politically and national security, will face the full rigor of the law,” said Magyar, who, however, did not discuss the details of the hacker attack, its extent, the quantity and quality of the leaked data, nor its further fate, nor did he talk about when the attack was noticed and whether a report was filed. However, he apologized for the incident.

The Tisza Világ application went live in early September 2025. In October, Index reported on a data leak related to the app, after which the Tisza Party ordered an internal investigation, which concluded that their application's databases were"attacked as part of a coordinated secret service operation, and there is a strong suspicion that one of the Tisza volunteers who had access to the databases was an insider in Orbán's secret service," wrote Márk Radnai, vice president of the Tisza Party, at the time.