MLflow Artifact path traversal

Summaryinfo

A vulnerability was found in MLflow. It has been declared as critical. This impacts an unknown function of the component Artifact Handler. Executing a manipulation can lead to path traversal. The identification of this vulnerability is CVE-2026-2033. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in MLflow (version now known). It has been declared as critical. This vulnerability affects some unknown processing of the component Artifact Handler. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at zerodayinitiative.com. This vulnerability was named CVE-2026-2033. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/22/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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• MLflow

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CPE 2.2info

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