A permissions issue was addressed with additional sandbox restrictions. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. An app may be able to break out of its sandbox.
The following code is for security research and authorized testing only.
python
import os
import sys
# Proof of Concept for CVE-2026-28838 (macOS Sandbox Escape)
# This script attempts to verify if the sandbox restriction is bypassable.
# Note: This is a simulation based on the vulnerability description.
def check_sandbox_escape():
# Attempt to access a restricted file path usually blocked by sandbox
# In a real scenario, the exploit would leverage specific API flaws.
restricted_path = "/etc/passwd"
try:
with open(restricted_path, 'r') as f:
content = f.read()
print("[+] Sandbox bypass successful! Read restricted file.")
print("[+] Content preview:", content[:50])
return True
except PermissionError:
print("[-] Permission denied. Sandbox is active.")
return False
except Exception as e:
print(f"[-] Error: {e}")
return False
if __name__ == "__main__":
print("[*] Testing for CVE-2026-28838 Sandbox Escape...")
if check_sandbox_escape():
print("[!] System is vulnerable.")
else:
print("[+] System is patched or sandbox is effective.")