Vulnerability in Lfprojects Mlflow
CVE-2026-8147
In MLflow versions prior to 3.14.0, when running with authentication enabled, the trace API endpoints lack proper authorization validators. This allows any authenticated user to bypass experiment-level authorization controls on all trace operations, including reading, deleting, and modifying traces on experiments they do not have permission to access. The issue arises from the `_before_request` handler, which does not register authorization validators for trace endpoints, resulting in requests proceeding without validation. This vulnerability can expose sensitive data, destroy audit logs, and allow unauthorized modifications.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (44.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Lfprojects Mlflow
- Mlflow Mlflow/mlflow — versions unspecified
Weakness classification (CWE)
References
- huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5 (Exploit, Third Party Advisory)
- github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937 (Patch)
Frequently asked questions
- What is CVE-2026-8147?
- CVE-2026-8147 is a high-severity vulnerability in Lfprojects Mlflow, classified under Improper Access Control. CVSS score: 8.1/10. Published 2026-07-02.
- How severe is CVE-2026-8147?
- High severity. CVSS v3 base score is 8.1 out of 10.