CVE-2026-27647
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 stations uses predictable session identifiers derived from charging station identifiers, and allows multiple endpoints to connect using the same session ID. This enables session hijacking/shadowing where a new connection displaces the legitimate charging station and receives backend commands intended for the original station.
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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 Mobility46.se deploymentReview your environment inventory or dependencies to confirm if Mobility46 Mobility46.se charging station management software is installed or in use.Affected if Mobility46.se is deployed in the environment
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Locate WebSocket endpoint for charging stationsExamine network traffic or application configuration files to identify WebSocket endpoints used for charging station communication. Look for ws:// or wss:// URIs handling station management.Affected if WebSocket endpoints exist for charging station management
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Inspect session identifier generationCapture or log WebSocket connection initialization messages to observe how session identifiers are created. Check if IDs follow predictable patterns resembling station IDs or sequential values.Affected if Session identifiers are based on or derived from charging station IDs rather than random values
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Test for duplicate connection handlingOpen two WebSocket connections using the same session identifier or station ID from different clients. Observe if both connections remain active or if the second displaces the first.Affected if Multiple simultaneous connections with identical session IDs are accepted and both remain active or the second displaces the original
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Verify single-session enforcementReview application logs or connection state during normal operation to determine if the system rejects new connections when an active session with the same ID exists.Affected if The system does not enforce one active session per station ID
A user is affected if Mobility46.se is deployed and its WebSocket backend permits predictable session IDs based on station identifiers and allows duplicate connections with the same session identifier.
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 unique session identifiers, enforce single active session per charging station, and require re-authentication before allowing a new connection to replace an existing valid session.
- Consultation4.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,040.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-27647 — 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-2026-27647 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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