A permissions issue was addressed with additional restrictions. This issue is fixed in iOS 26.4 and iPadOS 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. An app may be able to fingerprint the user.
The following code is for security research and authorized testing only.
python
// Conceptual PoC for Device Fingerprinting via Permission Bypass
// This code simulates an app accessing device info that should be restricted
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
int main(int argc, char * argv[]) {
@autoreleasepool {
// Simulate accessing restricted device info
NSString *deviceModel = [[UIDevice currentDevice] model];
NSString *systemVersion = [[UIDevice currentDevice] systemVersion];
// Hypothetical access to a restricted identifier or system feature
// that was supposed to be blocked in older versions
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSDictionary *fingerprintData = @{
@"model": deviceModel,
@"os": systemVersion,
@"restricted_access": @"success" // Proof of bypass
};
NSLog(@"Fingerprint Data: %@", fingerprintData);
// In a real exploit, this data would be exfiltrated to a remote server
}
return 0;
}