CVE-2026-26290
Published: 27 February 2026
Summary
CVE-2026-26290 is a high-severity Insufficient Session Expiration (CWE-613) vulnerability in Ev.Energy Ev.Energy. Its CVSS base score is 7.3 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 16.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Locks the device (typically after inactivity) until re-authentication, addressing insufficient session expiration by preventing indefinite access.
Automatically terminating sessions after a defined period directly enforces session expiration, preventing indefinite session lifetimes that attackers can exploit.
Re-authentication after inactivity or time-based triggers prevents indefinite use of potentially hijacked or stale sessions.
Terminating sessions and network connections upon completion prevents insufficient session expiration.
Directly enforces termination of network sessions after inactivity or end-of-session, preventing indefinite session lifetime.
Consistent clocks across systems allow session expiration and timeout enforcement to function as intended in distributed environments.
When the non-persistent artifact is a session or connection, mandatory termination implements the missing expiration that CWE-613 describes.
Timed refresh of session-related information or on-demand generation plus deletion implements proper session expiration.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Public-facing WebSocket session management flaw (predictable/reusable IDs, insufficient expiration) directly enables unauthenticated exploitation of the application (T1190) and remote service session hijacking to impersonate stations/users or intercept commands (T1563).
NVD Description
The WebSocket backend uses charging station identifiers to uniquely associate sessions but allows multiple endpoints to connect using the same session identifier. This implementation results in predictable session identifiers and enables session hijacking or shadowing, where the most recent connection…
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displaces the legitimate charging station and receives backend commands intended for that station. This vulnerability may allow unauthorized users to authenticate as other users or enable a malicious actor to cause a denial-of-service condition by overwhelming the backend with valid session requests.
Deeper analysisAI
CVE-2026-26290 affects the WebSocket backend in ev.energy's charging station management system, where charging station identifiers are used to associate sessions but permit multiple endpoints to connect using the same identifier. This design flaw produces predictable session identifiers, facilitating session hijacking or shadowing. In this scenario, the most recent connection overrides the legitimate charging station, intercepting backend commands intended for it. The vulnerability carries a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L) and is associated with CWE-613 (Insufficient Session Expiration).
Network-accessible attackers require no privileges or user interaction to exploit this issue. By leveraging predictable session identifiers, unauthorized parties can hijack active sessions, authenticate as legitimate charging stations or other users, and receive sensitive backend commands. Alternatively, malicious actors can induce a denial-of-service condition by flooding the backend with valid session requests, displacing legitimate connections and overwhelming system resources.
CISA's ICS Advisory ICSA-26-057-07 provides detailed guidance on mitigation, available at https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-07 and in CSAF JSON format at https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-07.json. Additional vendor information is at https://www.ev.energy/en-us.
Details
- CWE(s)