Vulnerability · Published Oct 27, 2026 · Assigned by GitHub_M
CVE-2026-116690MLflow: Arbitrary file read on unauthenticated MLflow servers via prompt model version source
High 7.5
In plain English
A high-severity path traversal in mlflow from mlflow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 79% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei. Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | mlflow | 3.17.0 | GHSA-m65p-9j7q-6w33 |
Affected products (as reported)
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/mlflow/mlflow/security/advisories/GHSA-m65p-9j7q-6w33 x_refsource_CONFIRM
- https://github.com/mlflow/mlflow/pull/25870 x_refsource_MISC
- https://github.com/mlflow/mlflow/commit/81730a2ce4ebcd60d5d18f68c96f422ad7e30772 x_refsource_MISC
- https://github.com/mlflow/mlflow/releases/tag/v3.17.0 x_refsource_MISC