Polish games firm CD Projekt has confirmed that employee data could be circulating online in the wake of the hack that took place in February.

In a post on its website, the Cyberpunk 2077 developer said that it isn't able to confirm exactly what information about both its current and former staff is online, but says that it has reason to believe it is being circulated online.

"We are not yet able to confirm the exact contents of the data in question, though we believe it may include current/former employee and contractor details in addition to data related to our games," CD Projekt said.

"Furthermore, we cannot confirm whether or not the data involved may have been manipulated or tampered with following the breach."

This is likely being circulated alongside source code for The Witcher 3: Wild Hunt, a version of that game supporting raytracing, as well as Cyberpunk 2077. Reports that this was available online emerged earlier this week.

Those source codes were sold at a dark web auction back in February for what is believed to have been $7 million.

Not only is employee data seemingly out in the open, but the hack also caused huge disruption to the studio due to the fact that staff were left unable to access their workstations.