Unrestricted File UploadWeakness · CWE-434

CVE-2026-1358

CRITICAL · 9.8 CVSS v3.1 Published 2026-02-12
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
Airleader Master versions 6.381 and prior allow for file uploads without restriction to multiple webpages running maximum privileges. This could allow an unauthenticated user to potentially obtain 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 confidence

Airleader Master versions 6.381 and prior contains an unrestricted file upload vulnerability across multiple webpages. Unauthenticated attackers can upload arbitrary files (such as malicious scripts) to the server, which executes with maximum privileges due to the application running with elevated rights, enabling complete remote code execution.

MitigationImplement strict file upload controls including file type allowlisting, MIME type validation, renaming uploaded files, storing uploads outside the webroot, disabling script execution in upload directories, and enforcing authentication on all upload endpoints.

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
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 checks

Work through these to decide whether this CVE applies to you.

  1. Determine installed Airleader Master version
    Locate the version information in the application administrative interface, about page, or check version files in the installation directory. Compare against the affected range: versions 6.381 and prior are vulnerable.
    Affected if The installed version is 6.381 or lower.
  2. Identify accessible file upload endpoints
    Review the web application for pages that accept file uploads. Check if these pages are reachable without authentication.
    Affected if File upload functionality exists and is accessible to unauthenticated users.
  3. Verify upload directory location
    Identify where uploaded files are stored. Check if the upload directory is located within the web server's document root (webroot).
    Affected if Uploaded files are stored inside the webroot, making them accessible via HTTP/HTTPS.
  4. Check script execution permissions on upload directory
    Inspect web server configuration to determine whether script execution (e.g., PHP, ASP, JSP) is permitted in the upload directory.
    Affected if Script execution is allowed in the directory where uploads are stored, enabling uploaded files to be executed.
  5. Assess web service privilege level
    Review the user account or service identity under which the web server process runs. Determine if it runs with administrative or elevated privileges.
    Affected if The web service executes with maximum privileges, allowing uploaded malicious code to run with elevated access.

You are affected if your Airleader Master version is 6.381 or prior AND unauthenticated file upload pages are accessible AND uploaded files can be executed from the webroot.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement strict file upload controls including file type allowlisting, MIME type validation, renaming uploaded files, storing uploads outside the webroot, disabling script execution in upload directories, and enforcing authentication on all upload endpoints.

Have this fixed Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing8.0 h
  • Review / QA4.0 h
30.0 hours of engineering $5,280
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Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2026-1358 — 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 sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-1358 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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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