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CVE-2026-2651— Missing Authorization Validation in mlflow/mlflow

Quick assessment

Affected
mlflow mlflow/mlflow
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MLflow是MLflow开源的一个简化机器学习开发的平台，包括跟踪实验、将代码打包成可重复的运行以及共享和部署模型。 MLflow 3.10.1.dev0及之前版本存在安全漏洞，该漏洞源于启用--serve-artifacts模式时，授权逻辑未对/mlflow-artifacts/mpu/*端点执行资源级权限检查，可能导致未经授权的访问，攻击者能够覆盖其他用户的工件，导致跨用户写入、模型供应链投毒以及加载受损模型时执行任意代码。

AI Predicted 9.8 Difficulty: Easy EPSS 0.54% · P43

Affected Version Matrix 1

VendorProduct Version RangeStatus
mlflow mlflow/mlflow unspecified< 3.10.0 affected
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I. Basic Information for CVE-2026-2651

Vulnerability Information
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Vulnerability Title
Missing Authorization Validation in mlflow/mlflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
MLflow 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MLflow是MLflow开源的一个简化机器学习开发的平台，包括跟踪实验、将代码打包成可重复的运行以及共享和部署模型。 MLflow 3.10.1.dev0及之前版本存在安全漏洞，该漏洞源于启用--serve-artifacts模式时，授权逻辑未对/mlflow-artifacts/mpu/*端点执行资源级权限检查，可能导致未经授权的访问，攻击者能够覆盖其他用户的工件，导致跨用户写入、模型供应链投毒以及加载受损模型时执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
mlflow mlflow/mlflow unspecified ~ 3.10.0 -

II. Public POCs for CVE-2026-2651

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III. Intelligence Information for CVE-2026-2651

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Patches & Fixes for CVE-2026-2651 (1)

Vendor Advisories for CVE-2026-2651 (1)

IV. Related Vulnerabilities

Same product: mlflow/mlflow
Same vendor: mlflow
Same weakness: CWE-862

V. Comments for CVE-2026-2651

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