This issue was addressed with improved entitlements. This issue is fixed in macOS Big Sur 11.0.1. A malicious application may be able to access restricted files.
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APPLE-SA-2020-12-14-4 Additional information for
APPLE-SA-2020-11-13-1 macOS Big Sur 1101
macOS Big Sur 1101 addresses the following issues
Information about the security content is also available at
supportapplecom/HT211931
AMD
Available for: Mac Pro (2013 and later), MacBook Air ( ...