The stormous ransomware group listed katholiekamersfoort.nl on its data leak site on 2026-06-02. Country: NL Sector: Education Domains named: katholiekamersfoort.nl Claim as published on the leak site: The church website's network (katholiekamersfoort.nl/) has been breached, resulting in the exfiltration of over 10 GB of data. This data pertains to donors, staff, and the personal information of a large number of individuals. The compromised data includes: Databases and Personally Identifiable Information (PII), internal network shares and document, contact lists, board and committee data, as well as system metadata.