CVE-2026-20895

High

Published: 27 February 2026

Published

27 February 2026

Modified

05 March 2026

KEV Added

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Patch

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CVSS Score 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS Score 0.0005 16.2th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-20895 is a high-severity Insufficient Session Expiration (CWE-613) vulnerability in Ev2Go Ev2Go.Io. Its CVSS base score is 7.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Remote Service Session Hijacking (T1563); ranked at the 16.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense at a Glance

What attackers do: exploitation maps to Remote Service Session Hijacking (T1563) and 1 other technique.

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.

AC-11 Device Lock

addresses: CWE-613

Locks the device (typically after inactivity) until re-authentication, addressing insufficient session expiration by preventing indefinite access.

AC-12 Session Termination

addresses: CWE-613

Automatically terminating sessions after a defined period directly enforces session expiration, preventing indefinite session lifetimes that attackers can exploit.

IA-11 Re-authentication

addresses: CWE-613

Re-authentication after inactivity or time-based triggers prevents indefinite use of potentially hijacked or stale sessions.

MA-4 Nonlocal Maintenance

addresses: CWE-613

Terminating sessions and network connections upon completion prevents insufficient session expiration.

SC-10 Network Disconnect

addresses: CWE-613

Directly enforces termination of network sessions after inactivity or end-of-session, preventing indefinite session lifetime.

SC-45 System Time Synchronization

addresses: CWE-613

Consistent clocks across systems allow session expiration and timeout enforcement to function as intended in distributed environments.

SI-14 Non-persistence

addresses: CWE-613

When the non-persistent artifact is a session or connection, mandatory termination implements the missing expiration that CWE-613 describes.

SI-21 Information Refresh

addresses: CWE-613

Timed refresh of session-related information or on-demand generation plus deletion implements proper session expiration.

MITRE ATT&CK Enterprise TechniquesAI

T1563 Remote Service Session Hijacking Lateral Movement

Adversaries may take control of preexisting sessions with remote services to move laterally in an environment.

attack.mitre.org →

T1078 Valid Accounts Stealth

Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.

attack.mitre.org →

Why these techniques?

Vulnerability enables session hijacking via predictable/reusable identifiers (T1563 Remote Service Session Hijacking) and impersonation using valid session material (T1078 Valid Accounts).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

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…

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-2026-20895 affects the WebSocket backend in charging station management systems, where charging station identifiers are used to uniquely associate sessions. However, the implementation permits multiple endpoints to connect using the same session identifier, resulting in predictable session identifiers. This flaw enables session hijacking or shadowing, in which the most recent connection displaces the legitimate charging station and intercepts backend commands intended for it. The vulnerability is associated with EV2Go (ev2go.io) and documented in CISA ICS Advisory ICSA-26-057-04, with 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 mapped to CWE-613 (Insufficient Session Expiration).

The vulnerability is exploitable over the network by unauthenticated attackers with low complexity requirements. An attacker can predict session identifiers to connect as a legitimate charging station, enabling unauthorized authentication as other users or interception of commands. Alternatively, a malicious actor can overwhelm the backend with valid session requests, causing a denial-of-service condition by displacing legitimate sessions.

CISA ICS Advisory ICSA-26-057-04, available at https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-04, along with the corresponding CSAF file at https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-04.json, provides details on mitigation strategies for this operational technology vulnerability.