3.5mlnpl.7z

The leak gained significant attention in early 2023 when the file was shared on several underground hacking forums and Telegram channels. Here is how it unfolded:

: It remains one of the largest concentrated sets of data specifically targeting a single nationality (Poland), which made it a primary tool for "credential stuffing" attacks against Polish banks and e-commerce sites. Checking Your Data 3.5mlnPL.7z

: The Polish government’s cybersecurity agency, CERT Polska , along with the Ministry of Digital Affairs, took the unusual step of integrating this specific data into the official service bezpiecznedane.gov.pl . This allowed Polish citizens to check if their specific PESEL (national ID) or email was part of this high-profile "3.5mlnPL" archive. The leak gained significant attention in early 2023

If you believe your information was in this file, you can check reputable breach notification sites like , which frequently indexes these major "combo" archives. This allowed Polish citizens to check if their

: The archive contained login credentials (emails and passwords) harvested from various sources. While it was initially feared to be a single breach of a major government portal or service, analysis revealed it was a "combo list" —a collection of data aggregated from many different, smaller breaches over several years.