CVE-2025-15031 Path Traversal Vulnerability in mlflow/mlflow
Attackers can write arbitrary files via crafted tar archives in MLflow, potentially leading to remote code execution in multi-tenant environments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-15031?
CVE-2025-15031 is a high-severity path traversal vulnerability in Lfprojects Mlflow, published on 18 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in MLflow's pyfunc extraction process allows for arbitrary file writes due to improper handling of tar archive entries. Specifically, the use of `tarfile.extractall` without path validation enables crafted tar.gz files containing `..` or absolute paths to escape the intended extraction directory. This issue affects the latest version of MLflow and poses a high/critical risk in scenarios involving multi-tenant environments or ingestion of untrusted artifacts, as it can lead to arbitrary file overwrites and potential remote code execution.
Weakness: CWE-22
Which versions are affected by CVE-2025-15031?
4 open source packages ship an affected version, including mlflow. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mlflow Bitnami | All versions | 3.11.1 |
mlflow PyPI | All versions | 3.9.0rc0 |
mlflow PyPI | All versions | 3.9.0rc0 |
mlflow PyPI | All versions | 3.9.0rc0 |
Products include Lfprojects Mlflow.
How do I fix CVE-2025-15031?
Upgrade mlflow to a fixed version for your release line: 3.11.1 or 3.9.0rc0.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-15031 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15031 exists.
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 BIT-mlflow-2025-15031, GHSA-fhff-qmm8-h2fp, PYSEC-2026-2656.