The just released video game “Untitled Goose Game” has an unsafe deserialization issue that could allow an attacker to execute malicious code.

Pulse Security’s Denis Andzakovic reported that an attacker needs to leverage a victim’s saved game to take advantage of the vulnerability in the game, which was released on Sept. 20, 2019.

“Untitled Goose Game used the dotnet BinaryFormatter to read and deserialize save game files. As no SerializationBinder was specified, an attacker who can control the save game file can exploit the deserialization process and execute arbitrary code. This is achieved by writing out a malicious serialized object to a save game file which is later read by Untitled Goose Game. The save game file is located in C:\Users\<USER>\AppData\LocalLow\House House\Untitled Goose Game\savegame0.save,” Andzakovic wrote.

The publisher House House on Oct. 7 responded three days later and had a patch issued by Oct. 22. Pulse Security waited until the this was in place before releasing its advisory.