CVE-2026-2651
CriticalCVSS 9.0Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
A vulnerability in MLflow versions up to 3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded.
Risk Assessment
The risk includes unauthorized data access, potential poisoning of models used in production, and possible system compromise through malicious code execution. Organizations using MLflow with `--serve-artifacts` mode are exposed to integrity and confidentiality breaches.
Recommendation
Immediately upgrade MLflow to version 3.10.0 or later. If upgrading is not possible, disable `--serve-artifacts` mode and restrict access to MPU endpoints using a firewall or access control lists.
Original NVD description (English source)
A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded. The issue is resolved in version 3.10.0.