CVE-2025-15381 Unauthorized Access to Tracing and Assessment Endpoints in mlflow/mlflow
Authenticated users can bypass permission checks to read trace data and create assessments in MLflow when basic-auth is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-15381?
CVE-2025-15381 is a high-severity missing authorization vulnerability in Lfprojects Mlflow, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In the latest version of mlflow/mlflow, when the `basic-auth` app is enabled, tracing and assessment endpoints are not protected by permission validators. This allows any authenticated user, including those with `NO_PERMISSIONS` on the experiment, to read trace information and create assessments for traces they should not have access to. This vulnerability impacts confidentiality by exposing trace metadata and integrity by allowing unauthorized creation of assessments. Deployments using `mlflow server --app-name=basic-auth` are affected.
Which versions are affected by CVE-2025-15381?
3 open source packages ship an affected version, including mlflow. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mlflow PyPI | All versions to 3.8.1 | None |
mlflow PyPI | All versions to 3.8.1 | None |
mlflow PyPI | All versions to 3.8.1 | None |
Products include Lfprojects Mlflow.
How do I fix CVE-2025-15381?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-15381 being exploited?
There is no known exploitation of CVE-2025-15381 in the wild and no public exploit code.
Other vulnerabilities in Lfprojects Mlflow
- CVE-2026-64849 MLflow Server-Side Request Forgery
- CVE-2025-15379 Command Injection in mlflow/mlflow
- CVE-2024-0520 Remote Code Execution due to Full Controlled File Write in mlflow/mlflow
- CVE-2023-6977 Path Traversal: '\..\filename'
- CVE-2023-6709 Improper Neutralization of Special Elements Used in a Template Engine in mlflow/mlflow
Sources
Also known as CLSA-2026-1790340259, GHSA-g6pg-52vf-843h, PYSEC-2026-2657.