High · CVSS 7.5CVE-2026-116690GHSA-M65P-9J7Q-6W33

MLflow: Arbitrary file read on unauthenticated MLflow servers via prompt model version sourceCVE-2026-116690

Answer in brief

CVE-2026-116690 records a High severity (CVSS 7.5) vulnerability in MLflow: Arbitrary file read on unauthenticated MLflow servers via prompt model version source. The current sources do not mark it as known exploited. The current feed maps mlflow/mlflow (generic), mlflow (pip). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps mlflow/mlflow (generic), mlflow (pip). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
mlflow/mlflowgeneric	>=3.10.0 <3.17.0	3.17.0
mlflowpip	>=3.10.0,<3.17.0	3.17.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for mlflow/mlflow, mlflow.
Review the reported fix. Update mlflow/mlflow to 3.17.0; mlflow to 3.17.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 27, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.