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CVE-2026-33866

4.3 · MEDIUM

MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artifacts.

Published Apr 7, 2026CWE-862EPSS 0.37%

Overview

CVE-2026-33866 is a medium-severity vulnerability. It was published on April 7, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artifacts. Due to missing access‑control validation, a user without permissions to a given experiment can directly query this endpoint and retrieve model artifacts they are not authorized to access.

This issue affects MLflow version through 3.10.1

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refafine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectorsRefcert.pl/en/posts/2026/04/CVE-2026-33865/GitHubgithub.com/mlflow/mlflow/pull/21708

How CyberStrike helps

Frequently asked questions

What is CVE-2026-33866?

CVE-2026-33866 is a medium-severity vulnerability. It was published on April 7, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-33866?

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-33866?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-33866?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-33866 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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