CVE-2026-64849

{
  "id": "CVE-2026-64849",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-17T22:17:23.580",
  "lastModified": "2026-10-26T13:10:00.140",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Starting in 3.3.0 and prior to 3.15.0, the unauthenticated POST /api/2.0/mlflow/webhooks/{id}/test endpoint calls _validate_webhook_url() in mlflow/utils/validation.py only for the original URL while mlflow/webhooks/delivery.py follows redirects and re-resolves the hostname without pinning the validated address, allowing attackers to reach internal or cloud metadata services and receive response_status and response_body. This issue is fixed in version 3.15.0."
    },
    {
      "lang": "es",
      "value": "MLflow es una plataforma de ingeniería de IA de código abierto para agentes, modelos de lenguaje grandes y modelos de aprendizaje automático. A partir de la versión 3.3.0 y versiones anteriores a la 3.15.0, el endpoint POST /api/2.0/mlflow/webhooks/{id}/test no autenticado llama a _validate_webhook_url() en mlflow/utils/validation.py solo para la URL original, mientras que mlflow/webhooks/delivery.py sigue las redirecciones y resuelve de nuevo el nombre de host sin fijar la dirección validada, lo que permite a los atacantes alcanzar servicios de metadatos internos o en la nube y recibir response_status y response_body. Este problema se ha solucionado en la versión 3.15.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "mlflow",
          "product": "mlflow",
          "versions": [
            {
              "version": ">= 3.3.0, < 3.15.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.7
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-20T03:55:29.820245Z",
          "id": "CVE-2026-64849",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "cisaExploitAdd": "2026-08-19",
  "cisaActionDue": "2026-09-02",
  "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
  "cisaVulnerabilityName": "MLflow Server-Side Request Forgery Vulnerability",
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "3.3.0",
              "versionEndExcluding": "3.15.0",
              "matchCriteriaId": "1020A84A-9C92-4581-ADC4-4522AD465BA2"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/mlflow/mlflow/issues/24179",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Mitigation"
      ]
    },
    {
      "url": "https://github.com/mlflow/mlflow/pull/24258",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/mlflow/mlflow/releases/tag/v3.15.0",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ]
    }
  ]
}