# CVE-2026-80104: DB-GPT 0.8.0 Path Traversal Arbitrary File Write via Skill Upload Filename

> Remote attackers can write arbitrary files via path traversal in skill uploads, leading to code execution due to missing authentication and path validation.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Aug 2026
- **Updated:** 29 Aug 2026
- **Also known as:** GHSA-x75h-xjfp-qrh8

## What is CVE-2026-80104?

CVE-2026-80104 is a critical path traversal vulnerability in eosphoros-ai DB-GPT, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

DB-GPT builds the destination path for an uploaded skill from the multipart filename without constraining it to the upload directory. skill_upload in packages/dbgpt-app/src/dbgpt_app/openapi/api_v1/agentic_data_api.py takes file.filename as given and writes the request body to upload_dir / filename. A path composed with that operator discards the left operand when the right one is absolute and follows parent references otherwise, so a filename such as ../../../tmp/x or /tmp/x resolves outside the intended directory; nothing canonicalises the result, checks that it remains under the upload root, or prevents a .py suffix. The route's only dependency is get_user_from_headers in dbgpt_serve/utils/auth.py, which returns a request carrying the admin role whether or not a user_id header is supplied, so the endpoint is reachable without credentials. A remote attacker holding no account can therefore write attacker-controlled bytes to any path the server process can write, place a new Python module inside the application package or replace one the application already imports, and obtain code execution in the server process when that module is next imported.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-80104?


## How do I fix CVE-2026-80104?

No fix has been published for CVE-2026-80104 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-80104 being exploited?

There is no known exploitation of CVE-2026-80104 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-80104 and fix it if it is affected.

What it is: CVE-2026-80104 is a critical path traversal vulnerability in eosphoros-ai DB-GPT, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-80104 in the wild and no public exploit code.

Affected product: eosphoros-ai DB-GPT. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-80104/ (Markdown: https://insights.sbomify.com/CVE-2026-80104/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-80104
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-80104
- OSV: https://osv.dev/vulnerability/CVE-2026-80104

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-80104/
Summaries are generated and may contain mistakes; the official description above is the record.