Sweden investigates CGI Sverige-linked leak of e-government platform source code in 2026

Swedish authorities are investigating a reported data leak tied to CGI Sverige after a threat actor called ByteToBreach claimed to have exposed source code and sensitive material from the country's e-government platform. CGI said the incident involved two internal test servers with an older application version and its source code accessible but no evidence of impact on production data or services. Officials and security researchers warned that the leaked code and documentation, if authentic, could pose ongoing risks to Swedish and European public cyber infrastructure.