This issue was addressed with improved validation of symlinks. This issue is fixed in macOS Ventura 13.6, tvOS 17, macOS Monterey 12.7, watchOS 10, iOS 17 and iPadOS 17, macOS Sonoma 14. An app may be able to read arbitrary files.
seclists.org/fulldisclosure/2023/Oct/10
seclists.org/fulldisclosure/2023/Oct/3
seclists.org/fulldisclosure/2023/Oct/5
seclists.org/fulldisclosure/2023/Oct/6
seclists.org/fulldisclosure/2023/Oct/8
seclists.org/fulldisclosure/2023/Oct/9
support.apple.com/en-us/HT213931
support.apple.com/en-us/HT213932
support.apple.com/en-us/HT213936
support.apple.com/en-us/HT213937
support.apple.com/en-us/HT213938
support.apple.com/en-us/HT213940