Incomplete Fix for CVE-2025-10279: Insecure Temporary Directory Permissions in mlflow/mlflow_CVE-2026-4137

{
    "lastseen": "",
    "description": "In mlflow/mlflow versions prior to 3.11.0, the `get_or_create_nfs_tmp_dir()` function in `mlflow/utils/file_utils.py` creates temporary directories with world-writable permissions (0o777), and the `_create_model_downloading_tmp_dir()` function in `mlflow/pyfunc/__init__.py` creates directories with group-writable permissions (0o770). These insecure permissions allow local attackers to tamper with model artifacts, such as cloudpickle-serialized Python objects, and achieve arbitrary code execution when the tampered artifacts are deserialized via `cloudpickle.load()`. This vulnerability is particularly critical in environments with shared NFS mounts, such as Databricks, where NFS is enabled by default. The issue is a continuation of the vulnerability class addressed in CVE-2025-10279, which was only partially fixed.",
    "published": "2026-05-18T20:26:23.104Z",
    "modified": "2026-05-18T20:26:23.104Z",
    "type": "cve",
    "title": "Incomplete Fix for CVE-2025-10279: Insecure Temporary Directory Permissions in mlflow/mlflow",
    "source": "@huntr_ai",
    "references": "https://huntr.com/bounties/648dc30b-76c7-4433-86b8-f43d926fd8d6\nhttps://github.com/mlflow/mlflow/commit/1dcbb0c2fbd1f446c328830e601ca13a28219b8a",
    "id": "CVE-2026-4137",
    "bulletinFamily": "",
    "cwe": [
        "CWE-378"
    ],
    "cvelist": null,
    "sourceData": "mlflow mlflow/mlflow unspecified",
    "sourceHref": "",
    "cvss": {
        "score": 7,
        "severity": "HIGH",
        "vector": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/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": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "mlflow/mlflow",
    "version": "unspecified",
    "vendor": "mlflow",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
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    "ai_score": 0
}