{
  "id": "CVE-2026-64849",
  "url": "https://spydr.io/cve/CVE-2026-64849",
  "published": "2026-08-17T22:17:23.580Z",
  "modified": "2026-10-05T13:35:35.850Z",
  "score": 9.3,
  "severity": "critical",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N",
  "score_source": "github.com",
  "epss": 0.09839,
  "epss_percentile": 0.95429,
  "exploited": true,
  "kev": {
    "added": "2026-08-19",
    "due": "2026-09-02",
    "action": "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.",
    "ransomware": "Unknown",
    "name": "MLflow Server-Side Request Forgery Vulnerability",
    "notes": "https://github.com/mlflow/mlflow/pull/24258 ; https://github.com/mlflow/mlflow/issues/24179 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-64849"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "mlflow"
  ],
  "products": [
    "mlflow"
  ],
  "cwes": [
    "CWE-918"
  ],
  "description": "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.",
  "status": "Analyzed",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 9.3,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/mlflow/mlflow/issues/24179",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Mitigation"
      ]
    },
    {
      "url": "https://github.com/mlflow/mlflow/pull/24258",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/mlflow/mlflow/releases/tag/v3.15.0",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64849",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}