CVE-2026-2033 MLflow Tracking Server Artifact Handler Directory Traversal Remote Code Execution Vulnerability
Remote attackers can execute arbitrary code on MLflow Tracking Server via path traversal in artifact handling without authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-2033?
CVE-2026-2033 is a high-severity path traversal vulnerability in MLflow, published on 20 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
MLflow Tracking Server Artifact Handler Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of MLflow Tracking Server. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of artifact file paths. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-26649.
Weakness: CWE-22
Which versions are affected by CVE-2026-2033?
3 open source packages ship an affected version, including mlflow.
| Package | Affected | Fixed in |
|---|---|---|
mlflow PyPI | All versions | 3.8.0rc0 |
mlflow PyPI | All versions | 3.8.0rc0 |
mlflow PyPI | All versions | 3.8.0rc0 |
How do I fix CVE-2026-2033?
Upgrade mlflow to 3.8.0rc0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-2033 being exploited?
There is no known exploitation of CVE-2026-2033 in the wild and no public exploit code.
Sources
Also known as GHSA-q2r8-vmq7-fpx2, PYSEC-2026-2658.