A vulnerability in the "_create_model_version()" handler of "mlflow/server/handlers.py" in mlflow/mlflow versions 3.9.0 and earlier allows an unauthenticated remote attacker to read arbitrary files from the server's filesystem. The issue arises when a "CreateModelVersion" request includes the tag "mlflow.prompt.is_prompt", which bypasses source path validation. This enables an attacker to store an arbitrary local filesystem path as the model version source. The "get_model_version_artifact_handler()" function later uses this source to serve files without verifying the model version's prompt status, leading to a complete confidentiality compromise. This issue is fixed in version 3.10.0.