CVE-2026-4505
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 vulnerability has been found in eosphoros-ai DB-GPT up to 0.7.5. This issue affects the function module_plugin.refresh_plugins of the file packages/dbgpt-serve/src/dbgpt_serve/agent/hub/controller.py of the component FastAPI Endpoint. Such manipulation leads to unrestricted upload. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may 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 confidenceA file upload vulnerability exists in DB-GPT's plugin refresh functionality (module_plugin.refresh_plugins) in the FastAPI endpoint. The application allows unrestricted file uploads without proper validation of file types, contents, or destination paths. This could enable remote attackers to upload malicious files (e.g., webshells) to the server, potentially achieving code execution through the plugin system.
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 checksWork through these to decide whether this CVE applies to you.
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Confirm DB-GPT installationLocate the dbgpt installation directory or check installed packages using pip list | grep dbgpt or find / -name 'dbgpt' -type d 2>/dev/nullAffected if DB-GPT is present on the system
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Identify plugin refresh endpoint exposureExamine FastAPI route definitions in the dbgpt source code for routes handling plugin refresh (look for 'refresh_plugins' in api routes or router definitions)Affected if The /plugin/refresh or similar endpoint is defined and exposed in the API
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Check authentication on plugin endpointsReview authentication middleware configuration in dbgpt - check if plugin upload/refresh endpoints are protected by auth requirements or are publicly accessibleAffected if Plugin refresh endpoint allows unauthenticated or weakly authenticated access
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Inspect plugin storage directoryLocate the plugin installation directory (commonly dbgpt/plugins or similar) and list all files - look for unexpected .py files, webshells, or non-standard plugin filesAffected if Unexpected or malicious files exist in the plugin directory
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Review access logs for plugin operationsCheck web server and application logs for requests to plugin upload/refresh endpoints, focusing on POST requests without proper authentication tokensAffected if Log entries show unauthenticated or unauthorized plugin upload/refresh requests
A user is affected if DB-GPT is running with its plugin refresh endpoint exposed without proper authentication, allowing unrestricted file uploads to the plugin directory.
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 file validation (type, size, content), store uploads outside the webroot with randomized filenames, and add proper authentication/authorization checks to the plugin upload endpoint. If a patched version exists, upgrade immediately.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-4505 — 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-2026-4505 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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- Version or environment caveats, and links to real fixes
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