Path Traversal in Mlflow
CVE-2026-116690
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Mlflow — versions >= 3.10.0, < 3.17.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-116690?
- CVE-2026-116690 is a high-severity vulnerability in Mlflow, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-10-27.
- How severe is CVE-2026-116690?
- High severity. CVSS v3 base score is 7.5 out of 10.