A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded. The issue is resolved in version 3.10.0.

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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Thu, 28 May 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1220
References
Metrics threat_severity

None

cvssV3_1

{'score': 9.0, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H'}

threat_severity

Critical


Tue, 26 May 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 25 May 2026 07:45:00 +0000

Type Values Removed Values Added
First Time appeared Mlflow
Mlflow mlflow/mlflow
Vendors & Products Mlflow
Mlflow mlflow/mlflow

Mon, 25 May 2026 06:45:00 +0000

Type Values Removed Values Added
Description A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded. The issue is resolved in version 3.10.0.
Title Missing Authorization Validation in mlflow/mlflow
Weaknesses CWE-862
References
Metrics cvssV3_0

{'score': 9, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: @huntr_ai

Published:

Updated: 2026-05-27T03:55:35.963Z

Reserved: 2026-02-18T01:33:23.276Z

Link: CVE-2026-2651

cve-icon Vulnrichment

Updated: 2026-05-26T14:21:52.787Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-25T07:16:15.100

Modified: 2026-05-26T20:06:20.310

Link: CVE-2026-2651

cve-icon Redhat

Severity : Critical

Publid Date: 2026-05-25T06:00:34Z

Links: CVE-2026-2651 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-28T01:30:03Z

Weaknesses