This issue was addressed by removing additional entitlements. This issue is fixed in GarageBand 10.4.3. A local attacker may be able to read sensitive information.
[
{
"product": "GarageBand",
"vendor": "Apple",
"versions": [
{
"lessThan": "10.4",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
]