CVE-2026-28766
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 · uneditedA specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.
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 confidenceA specific API/web endpoint in the Gardyn application lacks authentication enforcement, allowing any unauthenticated requester to retrieve all registered user account information including potentially sensitive personal data.
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 data< 2.12.2026CVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 Mygardyn Cloud Api is deployed in your environmentReview your running services, containers, or installed applications to determine if the Mygardyn Cloud Api component is present. Check application logs, container registries, or deployment manifests for references to 'Mygardyn' or 'gardyn'.Affected if Mygardyn Cloud Api is deployed and running in your environment
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Determine the installed version of Mygardyn Cloud ApiLocate the version information for your Mygardyn Cloud Api installation. Check the application itself, its deployment configuration, Docker image tags, or any version/configuration files shipped with the application. Compare your version against the affected range: versions before 2.12.2026 are vulnerable.Affected if The installed version is lower than 2.12.2026
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Identify the API endpoint that returns user account dataReview the API documentation, source code, or network traffic from the application to locate the endpoint that returns complete user account data. This endpoint would typically be related to user listing, user data retrieval, or user profile APIs.Affected if The vulnerable endpoint exists in your deployment and is accessible over the network
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Test if the endpoint requires authenticationSend an HTTP request to the identified user data endpoint without including any authentication credentials (no API key, session token, or bearer token). Observe the HTTP response status code and body.Affected if The endpoint returns user data (HTTP 200 with user information) when accessed without any authentication credentials
You are affected if Mygardyn Cloud Api version less than 2.12.2026 is deployed and the user data API endpoint is accessible without any authentication, returning complete user account information.
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 data2.12.2026
Implement proper authentication and session validation on the exposed endpoint, and add role-based authorization checks to ensure users can only access their own data.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-28766 — 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-2026-28766 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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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