{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "3.18.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "original_tag": "v3.18.0",
                "range": [
                  {
                    "fixed": "ba41106d110b67096384da12b6b85473457598db"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "range": [
                  {
                    "fixed": "ab5fc795eedc22348253cf687818cf2a16c15282"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "ba41106d110b67096384da12b6b85473457598db"
            },
            {
              "fixed": "ab5fc795eedc22348253cf687818cf2a16c15282"
            }
          ],
          "repo": "https://github.com/mlflow/mlflow",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/127xxx/CVE-2026-127202.json"
  },
  "details": "MLflow before 3.18.0 using the FileStore backend contains a path traversal vulnerability that allows unauthenticated remote attackers to write files outside the intended run directory by supplying a malicious model_id parameter to the log outputs API. Attackers can exploit the unvalidated model_id containing ../ sequences via the POST /api/3.0/mlflow/runs/outputs endpoint to create directories and write a meta.yaml file at arbitrary filesystem locations, limited only by the server account's permissions. FileStore was the default backend before 3.7.0 and is opt-in afterward through MLFLOW_ALLOW_FILE_STORE.",
  "id": "CVE-2026-127202",
  "modified": "2026-11-14T02:30:51.362959825Z",
  "published": "2026-11-12T16:37:02.081Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/127xxx/CVE-2026-127202.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/mlflow/mlflow/releases/tag/v3.18.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-127202"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/mlflow-path-traversal-via-model-id-in-log-outputs-api"
    },
    {
      "type": "FIX",
      "url": "https://github.com/mlflow/mlflow/commit/ab5fc795eedc22348253cf687818cf2a16c15282"
    },
    {
      "type": "FIX",
      "url": "https://github.com/mlflow/mlflow/pull/27131"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mlflow/mlflow"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "MLflow \u003c 3.18.0 Path Traversal via model_id in log_outputs API"
}