| Component | MLflow |
| Severity | critical (CVSS 9.1) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Published (NVD) | 2026-03-18 |
| Last modified | 2026-07-15 |
| Affected versions | mlflow <= 3.10.1 |
| Fixed in | see the vendor advisory |
| Weakness | CWE-22 |
| CISA KEV | not listed |
NVD 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.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep MLflow off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2025-15031
- https://huntr.com/bounties/09856f77-f968-446f-a930-657d126efe4e
- https://access.redhat.com/security/cve/CVE-2025-15031
- https://bugzilla.redhat.com/show_bug.cgi?id=2448912
- https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-15031.json
Read more
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