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6.9
Charging Station Sessions Not Properly Secured in WebSocket Backend
CVE-2026-20895
Summary
The WebSocket backend for charging stations does not properly manage user sessions. This means that someone could potentially take over another user's session or flood the system with fake requests, causing it to slow down or become unresponsive. To protect your system, ensure that the WebSocket backend is updated to correctly handle and generate unique session identifiers for each user.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| ev2go | ev2go.io | All versions | – |
Original title
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 p...
Original 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.
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.
nvd CVSS3.1
7.5
nvd CVSS4.0
6.9
Vulnerability type
CWE-613
- https://ev2go.io/ Product
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-05... Third Party Advisory
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-04 Third Party Advisory US Government Resource
Published: 27 Feb 2026 · Updated: 12 Mar 2026 · First seen: 6 Mar 2026