Exploited vulnerability

CVE-2026-116690

TLP:CLEAR

lfprojects mlflow Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. From 3.10.0 until 3.17.0, the prompt branch in _create_model_version() accepts schemeless relative sources because path validation runs only when a source has a URL scheme, and mlflow.prompt.is_prompt is interpreted by tag presence rather than a true value. A remote caller can store a server-local path as the model version artifact location and use /api/2.0/mlflow/model-versions/get-artifact to read files accessible to the MLflow server process. Default unauthenticated servers require no privileges, while basic-auth deployments are exposed to authenticated users who can create registered models. This issue is fixed in version 3.17.0.

Facts

Vendor: MLflow
Product: MLflow
EPSS (probability of exploitation within 30 days): 0.6 %
First known exploitation: 28 October 2026
First seen by Risk Letters: 28 October 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD