MLflow up to 3.9.x handlers.py _create_model_version path traversal

Summaryinfo

A vulnerability, which was classified as critical, has been found in MLflow up to 3.9.x. Affected by this vulnerability is the function _create_model_version of the file mlflow/server/handlers.py. Performing a manipulation results in path traversal. This vulnerability is cataloged as CVE-2026-2614. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in MLflow up to 3.9.x. It has been classified as critical. This affects the function _create_model_version of the file mlflow/server/handlers.py. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality. The summary by CVE is:

A vulnerability in the `_create_model_version()` handler of `mlflow/server/handlers.py` in mlflow/mlflow versions 3.9.0 and earlier allows an unauthenticated remote attacker to read arbitrary files from the server's filesystem. The issue arises when a `CreateModelVersion` request includes the tag `mlflow.prompt.is_prompt`, which bypasses source path validation. This enables an attacker to store an arbitrary local filesystem path as the model version source. The `get_model_version_artifact_handler()` function later uses this source to serve files without verifying the model version's prompt status, leading to a complete confidentiality compromise. This issue is fixed in version 3.10.0.

The advisory is shared at huntr.com. This vulnerability is uniquely identified as CVE-2026-2614 since 02/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 3.10.0 eliminates this vulnerability. Applying the patch 6e801f4259d96804c73107315b24cef0f6aa115a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• MLflow

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9

License

• open-source

Website

• Product: https://github.com/mlflow/mlflow/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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