A Groovy sandbox is a restricted execution environment that limits what Groovy scripts can do. It is used when software allows users or administrators to run custom scripts, but must keep those scripts from freely reading files, calling system commands, loading dangerous classes, or reaching sensitive application objects.
In cyber security, sandboxes matter because script flexibility is powerful and risky at the same time. They let platforms support automation and customization while reducing the chance that a script becomes full code execution. Attackers often look for ways to bypass sandbox checks, since a successful bypass can turn a “safe” scripting feature into an entry point for privilege escalation, data theft, or remote code execution. Defenders should treat sandboxing as a control boundary: use allowlists, disable unneeded APIs, and test whether scripts can escape the intended restrictions.