---
id: CVE-2025-10279
aliases:
  - GHSA-4x5p-f36r-mxxr
  - BIT-mlflow-2025-10279
  - PYSEC-2026-1639
title: mlflow Creates of Temporary File in Directory with Insecure Permissions
summary: mlflow Creates of Temporary File in Directory with Insecure Permissions
severity: high
cvss: 7
cvssVector: 'CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: mlflow
product: mlflow
ecosystem: pip
affected:
  - mlflow < 3.4.0rc0
patched:
  - mlflow 3.4.0rc0
published: '2026-02-02'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:34.192729513Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-4x5p-f36r-mxxr'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-10279'
  - url: >-
      https://github.com/mlflow/mlflow/commit/1d7c8d4cf0a67d407499a8a4ffac387ea4f8194a
  - url: 'https://github.com/mlflow/mlflow'
  - url: 'https://huntr.com/bounties/01d3b81e-13d1-43aa-b91a-443aec68bdc8'
tags:
  - osv
  - pip
epss: 0.00228
epssPercentile: 0.12193
ingestedAt: '2026-07-08T18:25:45.719Z'
---

## Overview

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.

## Affected packages

- `mlflow < 3.4.0rc0`

## Remediation

Upgrade to a patched release:

- `mlflow 3.4.0rc0`