CVE-2025-10279 Privilege Escalation in mlflow/mlflow
An attacker with local write access to /tmp can exploit a race condition in MLflow's virtual environment creation to achieve arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-10279?
CVE-2025-10279 is a high-severity vulnerability in Lfprojects Mlflow, published on 2 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In mlflow version 2.20.3, the temporary directory used for creating Python virtual environments is assigned insecure world-writable permissions (0o777). This vulnerability allows an attacker with write access to the `/tmp` directory to exploit a race condition and overwrite `.py` files in the virtual environment, leading to arbitrary code execution. The issue is resolved in version 3.4.0.
Weakness: CWE-379
Which versions are affected by CVE-2025-10279?
4 open source packages ship an affected version, including mlflow. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mlflow Bitnami | All versions | 3.4.0 |
mlflow PyPI | All versions | 3.4.0rc0 |
mlflow PyPI | All versions | 3.4.0rc0 |
mlflow PyPI | All versions | 3.4.0rc0 |
Products include Lfprojects Mlflow.
How do I fix CVE-2025-10279?
Upgrade mlflow to a fixed version for your release line: 3.4.0 or 3.4.0rc0.
Is CVE-2025-10279 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-10279 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-2025-10279, GHSA-4x5p-f36r-mxxr, PYSEC-2026-1639.