Protect Host Images
ProtectHostImages is a sandbox setting in Sandboxie Ini available since v1.9.0 / 5.64.0. This setting can be enabled to prevent processes located outside the sandbox from loading boxed DLLs.
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[DefaultBox]
ProtectHostImages=y
Related Sandboxie Plus setting: Sandbox Options > Various Options > Dlls & Extensions > Prevent sandboxed programs installed on host from loading DLLs from the sandbox