CVE-2026-27652
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe WebSocket backend for charging station management uses predictable session identifiers and fails to enforce uniqueness, allowing multiple endpoints to connect with the same session ID. This enables session hijacking where an attacker connecting with a known/predictable session ID can displace the legitimate station and intercept commands intended for it, or overwhelm the backend with competing valid session requests.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE dataall versionsCVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify if Cloudcharge WebSocket backend is exposedCheck network listening services or configuration for WebSocket endpoints serving charging station management on ports typically used (such as 8080, 8443, or configured WS/WSS ports). Inspect any reverse proxy or load balancer logs for connections to /ws or WebSocket upgrade paths.Affected if The WebSocket backend for Cloudcharge charging station management is reachable and accepting connections.
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Inspect session ID generation mechanismReview the backend source code or configuration for how WebSocket connection session identifiers are created. Look for session token generation functions, typically involving random or UUID generation methods.Affected if Session IDs are generated using predictable methods (sequential numbers, timestamp-based values, weak random seeds) rather than cryptographically secure random tokens.
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Check for session uniqueness enforcementExamine backend code for session management logic. Specifically look for whether the system checks for existing active sessions with the same ID before accepting a new connection, and whether it rejects or invalidates duplicate sessions.Affected if The backend allows multiple concurrent WebSocket connections with identical session identifiers without rejecting or invalidating the previous session.
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Verify station identifier bindingInspect how the backend maps session IDs to specific charging station identifiers. Check if new connections for an existing station ID automatically invalidate prior sessions or if both can coexist.Affected if The system does not tie sessions uniquely to charging station identifiers, allowing an attacker to connect with a known session ID and intercept commands.
You are affected if your Cloudcharge environment exposes the WebSocket backend and lacks cryptographically random session token generation with proper uniqueness enforcement per charging station.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement cryptographically random session tokens with proper uniqueness enforcement, reject duplicate active sessions per charging station identifier, and invalidate previous sessions upon new connections.
- Consultation4.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,808.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-27652 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-27652 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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