FKIE_CVE-2026-2635

Vulnerability from fkie_nvd - Published: 2026-02-20 23:16 - Updated: 2026-02-23 18:13
Severity ?
9.8 (Critical) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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. The 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.
References
zdi-disclosures@trendmicro.comhttps://github.com/mlflow/mlflow/pull/19260
zdi-disclosures@trendmicro.comhttps://www.zerodayinitiative.com/advisories/ZDI-26-111/
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de Omisi\u00f3n de Autenticaci\u00f3n por Uso de Contrase\u00f1a Predeterminada en MLflow. Esta vulnerabilidad permite a atacantes remotos omitir la autenticaci\u00f3n en instalaciones afectadas de MLflow. No es necesario autenticase para explotar esta vulnerabilidad.\n\nLa falla espec\u00edfica existe en el archivo basic_auth.ini. El archivo contiene credenciales predeterminadas almacenadas en el c\u00f3digo. Un atacante puede aprovechar esta vulnerabilidad para omitir la autenticaci\u00f3n y ejecutar c\u00f3digo arbitrario en el contexto del administrador. Fue ZDI-CAN-28256."
    }
  ],
  "id": "CVE-2026-2635",
  "lastModified": "2026-02-23T18:13:53.397",
  "metrics": {
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "zdi-disclosures@trendmicro.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-20T23:16:05.577",
  "references": [
    {
      "source": "zdi-disclosures@trendmicro.com",
      "url": "https://github.com/mlflow/mlflow/pull/19260"
    },
    {
      "source": "zdi-disclosures@trendmicro.com",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-26-111/"
    }
  ],
  "sourceIdentifier": "zdi-disclosures@trendmicro.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1393"
        }
      ],
      "source": "zdi-disclosures@trendmicro.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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