Missing Authorization Validation in mlflow/mlflow_CVE-2026-2651

{
    "lastseen": "",
    "description": "A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded. The issue is resolved in version 3.10.0.",
    "published": "2026-05-25T06:00:34.002Z",
    "modified": "2026-05-25T06:00:34.002Z",
    "type": "cve",
    "title": "Missing Authorization Validation in mlflow/mlflow",
    "source": "@huntr_ai",
    "references": "https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc\nhttps://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f",
    "id": "CVE-2026-2651",
    "bulletinFamily": "",
    "cwe": [
        "CWE-862"
    ],
    "cvelist": null,
    "sourceData": "mlflow mlflow/mlflow unspecified",
    "sourceHref": "",
    "cvss": {
        "score": 9,
        "severity": "CRITICAL",
        "vector": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
        "version": "3.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "mlflow/mlflow",
    "version": "unspecified",
    "vendor": "mlflow",
    "ai_description": "Unauthenticated access to multipart upload endpoints due to missing authorization validation, potentially leading to model supply chain poisoning and arbitrary code execution.",
    "ai_severity": "Critical",
    "ai_vendor": "MLflow",
    "ai_product": "MLflow",
    "ai_version": "<=3.10.1.dev0",
    "ai_score": 9
}