CVE-2026-27652
Published: 27 February 2026
Summary
CVE-2026-27652 is a medium-severity Insufficient Session Expiration (CWE-613) vulnerability in Cloudcharge Cloudcharge.Se. Its CVSS base score is 6.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 16.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AC-10 (Concurrent Session Control) and SC-23 (Session Authenticity).
Deeper analysis
CVE-2026-27652 is a vulnerability in the WebSocket backend for charging station management systems, where charging station identifiers are used to uniquely associate sessions, but the implementation permits multiple endpoints to connect using the same session identifier. This results in predictable session identifiers, facilitating session hijacking or shadowing, in which the most recent connection displaces the legitimate charging station and receives backend commands intended for it. The issue is rated 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 maps to CWE-613.
Attackers with network access can exploit this vulnerability without privileges or user interaction. An unauthorized user may authenticate as other users by hijacking sessions, gaining limited access to confidential information, modifying data, or executing commands on behalf of legitimate charging stations. Additionally, a malicious actor can cause a denial-of-service condition by overwhelming the backend with valid session requests, displacing legitimate connections.
CISA has published ICS Advisory ICSA-26-057-03 detailing the vulnerability, available at https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-03, along with a corresponding CSAF file at https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-03.json. Vendor support is referenced at https://cloudcharge.tech/support/contact/.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-8940
Vulnerability details
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.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Vulnerability in network-accessible WebSocket backend with weak/predictable session IDs directly enables exploitation of public-facing applications (T1190) and facilitates remote service session hijacking/shadowing by allowing unauthorized takeover of valid sessions (T1563).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly prevents multiple concurrent connections from using the same charging-station session identifier, blocking the hijacking/shadowing behavior.
Requires protection of session authenticity and binding, eliminating predictable or reusable WebSocket session identifiers that enable hijacking.
Mandates unique device identification and authentication for charging stations, addressing the root cause of identifier reuse and session displacement.