CVE-2026-40040
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 · uneditedPachno 1.0.6 contains an unrestricted file upload vulnerability that allows authenticated users to upload arbitrary file types by bypassing ineffective extension filtering to the /uploadfile endpoint. Attackers can upload executable files .php5 scripts to web-accessible directories and execute them to achieve remote code execution on the server.
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 confidencePachno 1.0.6 has an unrestricted file upload vulnerability in the /uploadfile endpoint where extension filtering can be bypassed, allowing authenticated users to upload executable .php5 files to web-accessible directories and 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
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 installed Pachno versionCheck the Pachno version number in the application (typically found in about page, version file, or admin dashboard)Affected if version is 1.0.6 (exact match from the CVE)
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Verify /uploadfile endpoint existsCheck if the /uploadfile endpoint is accessible in the Pachno installation by reviewing application routing configuration or attempting to access the endpoint with valid authenticationAffected if endpoint exists and accepts file uploads
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Confirm authentication access to upload functionalityDetermine if regular authenticated users (non-admin) can access file upload features in PachnoAffected if authenticated users have upload privileges
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Check upload directory web accessibilityInspect the upload directory configuration to determine if files are stored within the web server's document root (web-accessible)Affected if uploaded files are stored in directories accessible via HTTP/HTTPS
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Verify script execution is not disabled in upload directoriesCheck web server configuration (Apache .htaccess, Nginx config) for the upload directory to see if script execution restrictions are missingAffected if upload directory allows execution of uploaded scripts (e.g., .php, .php5 files)
User is affected if running Pachno 1.0.6 AND the /uploadfile endpoint is accessible to authenticated users AND uploaded files are placed in web-accessible directories where script execution is permitted.
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, store uploads outside the web root, and disable script execution in upload directories via web server configuration.
- Consultation3.0 h
- Implementation6.0 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 $4,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-40040 — 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-2026-40040 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
- No weaponised exploit code, or anything meant to cause harm
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