MLflow Use of Default Password Authentication Bypass Vulnerability_CVE-2026-2635

{
    "lastseen": "",
    "description": "MLflow Use of Default Password Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of MLflow. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the basic_auth.ini file. The file contains hard-coded default credentials. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of the administrator. Was ZDI-CAN-28256.",
    "published": "2026-02-20T22:25:03.494Z",
    "modified": "2026-02-20T22:25:03.494Z",
    "type": "cve",
    "title": "MLflow Use of Default Password Authentication Bypass Vulnerability",
    "source": "zdi",
    "references": "https://www.zerodayinitiative.com/advisories/ZDI-26-111/\nhttps://github.com/mlflow/mlflow/pull/19260",
    "id": "CVE-2026-2635",
    "bulletinFamily": "",
    "cwe": [
        "CWE-1393"
    ],
    "cvelist": null,
    "sourceData": "MLflow MLflow 3.4.0",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.0/AV:N/AC:L/PR:N/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": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "MLflow",
    "version": "3.4.0",
    "vendor": "MLflow",
    "ai_description": "Authentication bypass vulnerability in MLflow allowing remote attackers to execute arbitrary code",
    "ai_severity": "Critical",
    "ai_vendor": "MLflow",
    "ai_product": "MLflow",
    "ai_version": "3.4.0",
    "ai_score": 9.8
}