DB-GPT 0.8.0 Path Traversal Arbitrary File Write via Skill Upload Filename

{
  "id": "d956e7d1a81b5707281da960c16ff8bd7ac23d791a1b56d57e1370e663471a73",
  "url": "https://osv.dev/vulnerability/CVE-2026-80104",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DB-GPT 0.8.0 Path Traversal Arbitrary File Write via Skill Upload Filename",
    "summary": "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.",
    "evidence": "osv:CVE-2026-80104",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-80104",
      "aliases": [
        "CVE-2026-80104"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/eosphoros-ai/db-gpt",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a3f21350a97aa713e6223b052984dd5d939233f2"
                },
                {
                  "fixed": "177bfc84f77e7f7760c055a748b0e4bb82d9fa47"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.8.0"
                      },
                      {
                        "fixed": "0.8.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "177bfc84f77e7f7760c055a748b0e4bb82d9fa47"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.8.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.8.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80104.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.832936124Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80104.json",
        "https://github.com/eosphoros-ai/DB-GPT/releases/tag/v0.8.1",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-80104",
        "https://www.vulncheck.com/advisories/db-gpt-0.8.0-path-traversal-arbitrary-file-write-via-skill-upload-filename",
        "https://github.com/eosphoros-ai/DB-GPT",
        "https://pypi.org/project/dbgpt-app/",
        "https://github.com/eosphoros-ai/DB-GPT/blob/v0.8.0/packages/dbgpt-app/src/dbgpt_app/openapi/api_v1/agentic_data_api.py"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80104.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-80104",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506213,
  "published_at": "2026-08-25T20:18:35.843+00:00"
}