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CVE-2026-33865— Stored XSS via unsafe YAML parsing in MLflow

Quick assessment

Affected
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及之前版本存在跨站脚本漏洞，该漏洞源于Web界面解析YAML格式的MLmodel文件不当，可能导致存储型跨站脚本攻击。

AI Predicted 6.1 Difficulty: Easy EPSS 0.22% · P13
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I. Basic Information for CVE-2026-33865

Vulnerability Information
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Vulnerability Title
Stored XSS via unsafe YAML parsing in MLflow
Source: CVE Program / CVE List V5
Vulnerability Description
MLflow is vulnerable to Stored Cross-Site Scripting (XSS) caused by unsafe parsing of YAML-based MLmodel artifacts in its web interface. An authenticated attacker can upload a malicious MLmodel file containing a payload that executes when another user views the artifact in the UI. This allows actions such as session hijacking or performing operations on behalf of the victim. This issue affects MLflow version through 3.10.1
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
MLflow 跨站脚本漏洞
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及之前版本存在跨站脚本漏洞，该漏洞源于Web界面解析YAML格式的MLmodel文件不当，可能导致存储型跨站脚本攻击。
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 0 ~ 3.10.1 -

II. Public POCs for CVE-2026-33865

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III. Intelligence Information for CVE-2026-33865

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Patches & Fixes for CVE-2026-33865 (1)

Security Blog Posts for CVE-2026-33865 (1)

IV. Related Vulnerabilities

Same product: Mlflow
Same vendor: Mlflow
Same weakness: CWE-79

V. Comments for CVE-2026-33865

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