CVE-2026-64849

Published Aug 17, 2026

Last updated 2 days ago

Exploit known CVSS critical 9.3

Server

Overview

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.
Source: security-advisories@github.com
NVD status: Modified
Products: mlflow

Risk scores

CVSS 3.1

Type: Secondary
Base score: 9.3
Impact score: 4.7
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Severity: CRITICAL

Known exploits

Data from CISA

Vulnerability name: MLflow Server-Side Request Forgery Vulnerability
Exploit added on: Aug 19, 2026
Exploit action due: Sep 2, 2026
Required 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.

Weaknesses

security-advisories@github.com: CWE-918

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "D762205E-C76F-495C-94C6-83DB1D4AF018",
            "versionEndExcluding": "3.15.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.

Overview

Risk scores

CVSS 3.1

Known exploits

Weaknesses

Social media

Configurations

Related CVEs

References