CVE-2026-40702
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 · uneditedWebSocket endpoints lack proper authentication mechanisms, enabling attackers to impersonate charging stations. As a result, attackers can exploit this weakness to gain unauthorized access to sensitive data or perform unauthorized actions. Given that no authentication is required, this can lead to privilege escalation and potentially compromise the security of the entire system.
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 · moderate confidenceWebSocket endpoints in the affected system lack proper authentication mechanisms, allowing attackers to impersonate charging stations and gain unauthorized access to sensitive data or perform privileged actions. This authentication bypass enables complete compromise of the charging station communication layer.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- High
- Integrity
- High
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
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.
-
Identify WebSocket endpoints in the environmentReview application configuration files, API specifications, and network exposure settings to locate all WebSocket endpoint definitions (ws:// or wss:// URLs). Search for terms like 'WebSocket', 'socket', 'endpoint', and port 443/80 variants used for real-time communication.Affected if WebSocket endpoints exist and are accessible without documented authentication requirements.
-
Verify authentication is enforced on WebSocket connectionsExamine the WebSocket handshake process and connection initialization code. Check if the server requires and validates credentials, tokens, or certificates during the WebSocket upgrade handshake before allowing the connection to persist.Affected if WebSocket connections can be established without providing valid authentication credentials.
-
Confirm charging station identity validation existsInspect the authentication logic that runs after a WebSocket connection is established. Look for code that verifies the charging station identity (e.g., station ID validation, certificate subject validation, or token claims verification) before accepting commands or data.Affected if The system accepts commands or data from WebSocket clients without validating that they represent legitimate, authorized charging stations.
-
Test for anonymous access to privileged operationsConnect to the WebSocket endpoint using a tool like wscat or a custom client without providing any station credentials. Attempt to send commands or request data that should only be available to authenticated charging stations.Affected if Commands or sensitive data are accessible or modifiable without having authenticated as a known charging station.
A user is affected if their environment exposes WebSocket endpoints that accept connections without requiring proper charging station authentication and identity verification.
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 robust authentication (e.g., certificate-based or token-based) for all WebSocket connections and verify charging station identity before allowing any operations.
- Consultation4.0 h
- Implementation16.0 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 $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-40702 — 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-2026-40702 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data