AI agent vulnerability · MLflow

CVE-2025-15031: Arbitrary file write via tar traversal in mlflow

highCVSS 3.0 8.1GHSA-fhff-qmm8-h2fp

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.

Published Mar 19, 2026

Affected packages

mlflow

Ecosystem: PyPI
Affected: < 3.9.0rc0
Fixed in: 3.9.0rc0
Check: pip show mlflow

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

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.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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