This issue was addressed with improved input validation. This issue is fixed in iOS 26.3 and iPadOS 26.3. An app may be able to access sensitive user data.
The following code is for security research and authorized testing only.
python
# This is a conceptual Proof of Concept (PoC) for CVE-2026-20686.
# It simulates an attempt to access sensitive data via an input validation bypass.
import os
def check_vulnerability():
# Simulate checking the OS version (Vulnerable if < 26.3)
# In a real scenario, this would check the actual device OS.
os_version = "26.2"
if os_version < "26.3":
print(f"[+] Target is vulnerable: iOS/iPadOS {os_version}")
# Simulate malicious input that bypasses validation
malicious_input = "../../../../../private/var/mobile/Library/SensitiveData.db"
# Attempt to access the resource (Conceptual)
if not validate_input(malicious_input):
print("[!] Input validation bypassed!")
print(f"[+] Accessing sensitive data at: {malicious_input}")
# In a real exploit, data exfiltration happens here
else:
print("[-] Input validation blocked the request.")
else:
print("[-] Target is patched.")
def validate_input(data):
# Vulnerable validation logic (simplified)
# The real vulnerability is that this check is missing or flawed.
return "../" not in data # This check is bypassed in the vulnerability
if __name__ == "__main__":
check_vulnerability()