dbcve.org
Improper Access ControlWeakness · CWE-284

CVE-2026-4586

MEDIUM · 6.3 CVSS v3.1 Published 2026-03-23
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
69/100
Remediation priority · Elevated
Remotely reachable 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
A vulnerability was found in CodePhiliaX Chat2DB up to 0.3.7. This affects the function Upload of the file chat2db-server/chat2db-server-web/chat2db-server-web-api/src/main/java/ai/chat2db/server/web/api/controller/driver/JdbcDriverController.java of the component JDBC Driver Upload. Performing a manipulation results in unrestricted upload. The attack can be initiated remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

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 confidence

Unrestricted file upload vulnerability in the JDBC Driver Upload functionality of Chat2DB up to v0.3.7. The Upload function in JdbcDriverController.java lacks proper file type validation and content checks, allowing attackers to upload arbitrary files to the server. This could enable remote code execution if malicious executables or web shells are uploaded and subsequently accessed.

MitigationImplement strict server-side validation of uploaded files: whitelist allowed file extensions and MIME types, verify file magic bytes/headers, store uploads outside the web root with non-executable extensions, and add authentication/authorization controls to the upload endpoint. Since the vendor is unresponsive, these fixes must be applied internally.

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
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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. Identify Chat2DB installation and version
    Locate the Chat2DB application and determine its installed version. Check the JAR file name, war file name, or examine the application's build metadata or version file (often found in VERSION, about.html, or the manifest file within the deployed application)
    Affected if The installed version is v0.3.7 or any earlier version (v0.3.0 through v0.3.7)
  2. Locate the JDBC Driver Upload endpoint
    Identify if the JdbcDriverController.java is deployed and accessible. Check if the web application exposes an endpoint for JDBC driver uploads (typically under /jdbc-driver/upload or similar path in the application's routing configuration)
    Affected if The upload endpoint exists and is routable in the application
  3. Determine if upload functionality is enabled
    Examine the application's configuration files (application.yml, application.properties) for any flags controlling JDBC driver upload functionality. Check if the feature is disabled via configuration or if authentication is required for this endpoint
    Affected if The JDBC Driver Upload feature is enabled and accessible without explicit disabled configuration
  4. Check file storage location for uploaded drivers
    Inspect the application configuration to determine where uploaded JDBC driver files are stored. Look for upload directory paths in configuration files or the application's file system where driver files are placed
    Affected if Uploaded files are stored within the web root or in a location accessible via the web server without restrictions

You are affected if Chat2DB version is v0.3.7 or earlier AND the JDBC Driver Upload endpoint is accessible and enabled in your environment.

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 server-side validation of uploaded files: whitelist allowed file extensions and MIME types, verify file magic bytes/headers, store uploads outside the web root with non-executable extensions, and add authentication/authorization controls to the upload endpoint. Since the vendor is unresponsive, these fixes must be applied internally.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,490
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2026-4586 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2026-4586 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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
  • No spam, self-promotion, credentials, or personal data