Bug 2455900 (CVE-2026-33866)

Summary: CVE-2026-33866 MLflow: MLflow: Information disclosure via authorization bypass in AJAX endpoint
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jkoehler, lphiri
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in MLflow. A user without proper permissions to an experiment can exploit an authorization bypass in the AJAX endpoint, which is used for downloading saved model artifacts. This missing access-control validation allows the unauthorized user to directly query the endpoint and retrieve model artifacts they are not authorized to access, leading to information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-04-07 13:01:35 UTC
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