CVE-2026-64849 is a vulnerability classified as Server-Side Request Forgery (SSRF), affecting mlflow (affected versions: < 3.15.0). This vulnerability is rated Critical, with a CVSS score of 9.3. This vulnerability has been observed being exploited in the wild.
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MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. 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.
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