GitHub Advisoryadvisory · PyPI

GHSA-fhff-qmm8-h2fp Arbitrary file write via tar traversal in mlflow

HIGH Published 2026-03-19 Modified 2026-03-19 Official page ↗
Aliases
CVE-2025-15031
Ecosystem
PyPI
Packages
mlflow
Severity
High
CVSS vector
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-22
Reviewed
2026-03-19

Affected packages

• PyPI mlflow: < 3.9.0rc0 → fixed in 3.9.0rc0

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.

Related

Alias · CVE (1)

  • CVE-2025-15031 A vulnerability in MLflow's pyfunc extraction process allows for arbitrary file writes due to improper handling of tar archive entries. vulnerability

Weakness · CWE (1)

  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness

References