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CVE-2026-64849: MLflow is an open source AI engineering platform for agents, large language models, and machine lear…

Occurred
Aug 17, 2026
Published
Aug 17, 2026
Source
NVD CVE

Summary

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.

Tags

  • CVE
  • CVE-2026-64849
  • cvss:CRITICAL

Classification

Category confidence: 90%
Severity confidence: 85%

Rationale: Unauthenticated endpoint allows attackers to access internal metadata services, posing significant data exposure risk.

Classifier: Qwen/Qwen3.5-35B-A3B-FP8

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