The Hydro-Québec Le Circuit Electrique charging station backend contains a vulnerability (CVE-2026-20744) where its websocket endpoint does not enforce proper authentication. This lack of access control can lead to privilege escalation, allowing attackers to gain unauthorized elevated access. The vulnerability is classified under CWE-284 (Improper Access Control) and has a critical CVSS 3.1 score of 9.8, reflecting network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability. There is no vendor advisory or patch information available at this time.

Successful exploitation could allow an attacker to connect to the websocket endpoint without authentication and escalate privileges, potentially compromising the charging station backend's confidentiality, integrity, and availability. This could lead to unauthorized control or disruption of charging station operations.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict network access to the websocket endpoint to trusted entities only and monitor for unauthorized connection attempts.