The source codes for CS: GO and Team Fortress 2 was recently leaked to the public. As of right now, the source of the leak is not yet known. What is known is that the code leaked out was dated to be from 2017-2018, and was leaked back in 2018. Valve News Network’s Tyler McVicker regularly reports on various events concerning Valve, such as internal leaks. According to Tyler McVicker, the leak came from member of the Source engine development community, which he disclosed during a live stream.
Tyler McVicker also claimed that Source Engine modding team Lever Softworks took steps to contain the leak later notifying Valve. Tyler McVicker commented that source code was previously leaked, but the new leak did not originate from the same person, although a member of Lever Softworks was recently booted. “I did not leak this source code, and in fact I never had it. I was very aware of it, and in fact the warning signs of the original leak—it was very apparent, and then it did leak sometime in late 2018, and then my little group of Source Engine developers, all on this Lever Softworks Discord server, were discussing the leak and how to contain it, how to keep it from hitting critical mass.” Tyler McVicker commented.
Valve did respond to the leak. Valve stated that the leaked code was old and outdated. Valve promised to continue their investigation but there is no reason to be alarmed as the leaked code does not pose any threat to players of the game today. Although the leaked code does pose a danger to any development group that the code has been licensed to, as Valve does have the right to pull their development rights if the issue is too prevalent or dangerous.
Despite the reassurance from Valve, community groups such as Red Sun Over Paradise have temporarily taken down their servers. “Allegedly, remote code execution exploit that could be used to run malicious code on your client has already been discovered and many more of that kind are likely to come,” a notification on the official Red Sun Discord commented. They recommended to not play the games online until Valve releases an all-clear update.