An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in tvOS 26.1, macOS Tahoe 26, watchOS 26.1, iOS 26.1 and iPadOS 26.1. An app may be able to access sensitive user data.
https://support.apple.com/en-us/125639
https://support.apple.com/en-us/125637
https://support.apple.com/en-us/125632