Vulnerability in Lfprojects Mlflow
CVE-2026-3198
MLflow 3.9.0 with basic-auth (`--app-name basic-auth`) fails to enforce authorization checks for multiple Gateway API 'list' endpoints. Specifically, the `BEFORE_REQUEST_HANDLERS` dictionary in `mlflow/server/auth/__init__.py` does not include entries for `ListGatewaySecretInfos`, `ListGatewayEndpoints`, and `ListGatewayModelDefinitions`. This allows any authenticated user, regardless of their assigned permissions, to enumerate all gateway secrets, endpoints, and model definitions. This vulnerability exposes sensitive information, such as API keys, endpoint configurations, and proprietary model definitions, to unauthorized users.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (27.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
- Lfprojects Mlflow — versions 3.9.0
- Mlflow Mlflow/mlflow — versions unspecified
Weakness classification (CWE)
References
- huntr.com/bounties/e57db731-97d3-40c3-a429-831ee959807f (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-3198?
- CVE-2026-3198 is a medium-severity vulnerability in Lfprojects Mlflow, classified under Improper Access Control. CVSS score: 6.5/10. Published 2026-06-02.
- How severe is CVE-2026-3198?
- Medium severity. CVSS v3 base score is 6.5 out of 10.