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CVE-2026-2734

Estado: AnalizadaMedia (6.5)—

In mlflow/mlflow versions up to 3.9.0, the `SearchModelVersions` REST API endpoint and the `mlflowSearchModelVersions` GraphQL query lack proper per-model authorization checks when basic authentication is enabled. This allows any authenticated user to enumerate all model versions across all registered models, regardless of their permission level. The issue arises due to the absence of `SearchModelVersions` in the `BEFORE_REQUEST_VALIDATORS` and `AFTER_REQUEST_HANDLERS` for the REST API, and its omission from `GraphQLAuthorizationMiddleware.PROTECTED_FIELDS` for GraphQL.

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This vulnerability can expose sensitive information such as model names, version descriptions, source URIs, tags, and other metadata, potentially revealing proprietary or confidential details in multi-tenant environments. The issue is resolved in version 3.10.0.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Lfprojects — Mlflow

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-2734",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-2734",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-21T12:40:05.582361Z"
        }
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "security@huntr.dev",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@huntr.dev",
      "affectedData": [
        {
          "vendor": "mlflow",
          "product": "mlflow/mlflow",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "3.10.0",
              "versionType": "custom"
            }
          ]
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    }
  ],
  "published": "2026-05-21T05:16:22.723",
  "references": [
    {
      "url": "https://github.com/mlflow/mlflow/commit/6989066af33fdcb03588fd71a1a67f8fc5ef12c9",
      "tags": [
        "Patch"
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      "source": "security@huntr.dev"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@huntr.dev",
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
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      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In mlflow/mlflow versions up to 3.9.0, the `SearchModelVersions` REST API endpoint and the `mlflowSearchModelVersions` GraphQL query lack proper per-model authorization checks when basic authentication is enabled. This allows any authenticated user to enumerate all model versions across all registered models, regardless of their permission level. The issue arises due to the absence of `SearchModelVersions` in the `BEFORE_REQUEST_VALIDATORS` and `AFTER_REQUEST_HANDLERS` for the REST API, and its omission from `GraphQLAuthorizationMiddleware.PROTECTED_FIELDS` for GraphQL. This vulnerability can expose sensitive information such as model names, version descriptions, source URIs, tags, and other metadata, potentially revealing proprietary or confidential details in multi-tenant environments. The issue is resolved in version 3.10.0."
    },
    {
      "lang": "es",
      "value": "En las versiones de mlflow/mlflow hasta la 3.9.0, el endpoint de la API REST 'SearchModelVersions' y la consulta GraphQL 'mlflowSearchModelVersions' carecen de comprobaciones de autorización por modelo adecuadas cuando la autenticación básica está habilitada. Esto permite a cualquier usuario autenticado enumerar todas las versiones de modelos en todos los modelos registrados, independientemente de su nivel de permiso. El problema surge debido a la ausencia de 'SearchModelVersions' en los 'BEFORE_REQUEST_VALIDATORS' y 'AFTER_REQUEST_HANDLERS' para la API REST, y su omisión de 'GraphQLAuthorizationMiddleware.PROTECTED_FIELDS' para GraphQL. Esta vulnerabilidad puede exponer información sensible como nombres de modelos, descripciones de versiones, URIs de origen, etiquetas y otros metadatos, revelando potencialmente detalles propietarios o confidenciales en entornos multi-inquilino. El problema se resuelve en la versión 3.10.0."
    }
  ],
  "lastModified": "2026-07-23T15:10:00.137",
  "configurations": [
    {
      "nodes": [
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          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "3.10.0"
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  "sourceIdentifier": "security@huntr.dev"
}