CVE-2026-40750
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 · uneditedUnrestricted Upload of File with Dangerous Type vulnerability in themagnifico52 Kids Online Store allows Upload a Web Shell to a Web Server. This issue affects Kids Online Store: from n/a through 0.8.9.
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 confidenceThe Kids Online Store application from themagnifico52 (versions through 0.8.9) lacks proper file type validation on its upload functionality, allowing unauthenticated attackers to upload executable files such as web shells that can be accessed and executed on the server to achieve remote code execution.
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
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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 the application and versionLocate the application source code or running instance and check the version number in the main configuration file, package.json, or application metadata. Compare it against the affected range (versions through 0.8.9).Affected if The installed version is 0.8.9 or lower from themagnifico52 Kids Online Store application.
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Locate the file upload endpointSearch the application codebase for upload-related functionality, typically in PHP, Python, or Node.js handlers. Look for terms like 'upload', 'file_upload', '$_FILES', or multipart form handling.Affected if The application contains a file upload handler or form that accepts file submissions.
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Examine file type validation logicOpen the upload handler code and inspect the validation section. Look for checks on file extensions, MIME types, or file content/magic bytes before saving uploaded files.Affected if No extension validation, MIME type validation, or content-type validation exists in the upload code.
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Check upload directory accessibilityIdentify the upload directory path from the code (often named 'uploads', 'files', or similar). Determine if this directory is within the web server's document root and accessible via HTTP.Affected if The upload directory is located inside the web root and files can be accessed and executed via the web server.
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Verify script execution is not disabledCheck if the upload directory has any configuration preventing script execution (for example, .htaccess rules, nginx location directives, or application-level checks that deny .php, .js, .exe, or other executable extensions).Affected if No configuration exists to disable script execution in the upload directory.
A user is affected if they run the Kids Online Store application version 0.8.9 or lower and have the upload functionality exposed with a web-accessible upload directory that permits executable file types.
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 strict allowlist-based file validation (both MIME type and extension), store uploads outside the web root, rename uploaded files, and disable script execution in the upload directory.
- Consultation3.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-40750 — 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-2026-40750 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