CVE-2026-27764
Session Hijacking in WebSocket Backend via Predictable IDs
Publication date: 2026-03-06
Last updated on: 2026-05-05
Assigner: ICS-CERT
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mvm | mobiliti_e-mobi.hu | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-613 | According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization." |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability occurs because the WebSocket backend uses charging station identifiers to uniquely associate sessions but allows multiple endpoints to connect using the same session identifier.
As a result, session identifiers become predictable, enabling session hijacking or shadowing. In this scenario, the most recent connection can displace the legitimate charging station and receive backend commands intended for that station.
How can this vulnerability impact me? :
This vulnerability may allow unauthorized users to authenticate as other users, potentially gaining access to their sessions.
Additionally, a malicious actor could cause a denial-of-service condition by overwhelming the backend with valid session requests.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know