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CVE-2026-116692— MLflow: Remote code execution on unauthenticated MLflow servers via third-party scorer deserialization importing caller-placed artifact modules

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 是一个面向智能体、大语言模型和机器学习模型的开源 AI 工程平台。在 3.12.0rc0 至 3.17.0 版本期间， 中针对第三方评分器（scorer）的反序列化逻辑存在缺陷：它接受由请求方指定的、属于 所允许模块的子模块（descendants），而非强制要求完全匹配允许的模块。攻击者可利用 MLflow 的工件（artifact）端点，在一个可写的允许包下放置自定义 Python 模块，随后通过 接口提交该模块及其类。 方法会在进行追踪（trace）处理之前导入该模块并实例化其类。在禁用身份验证

CVSS 9.8 · Critical
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I. Basic Information for CVE-2026-116692

Vulnerability Information
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Vulnerability Title
MLflow: Remote code execution on unauthenticated MLflow servers via third-party scorer deserialization importing caller-placed artifact modules
Source: CVE Program / CVE List V5
Vulnerability Description
MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. From 3.12.0rc0 until 3.17.0, third-party scorer deserialization in mlflow/genai/scorers/base.py accepts request-selected descendants of THIRD_PARTY_SCORER_ALLOWED_MODULES rather than requiring an exact allowed module. A caller can use MLflow artifact endpoints to place a Python module beneath a writable allowed package and submit its module and class through /ajax-api/3.0/mlflow/scorer/invoke. Scorer.model_validate_json() imports the module and constructs the class before trace processing. Authentication-disabled deployments permit this code execution without credentials, while basic-auth deployments require a principal capable of creating an experiment and run and uploading artifacts. In either configuration, the allowed scorer package must be writable by the server process. This issue is fixed in version 3.17.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
mlflow mlflow >= 3.12.0rc0, < 3.17.0 -

II. Public POCs for CVE-2026-116692

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III. Intelligence Information for CVE-2026-116692

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Vendor Pages for CVE-2026-116692 (1)

Other References for CVE-2026-116692 (3)

Same Patch Batch · mlflow · 2026-10-27 · 3 CVEs total

CVE-2026-116690 7.5 HIGH MLflow: Arbitrary file read on unauthenticated MLflow servers via prompt model version sou
CVE-2026-116691 6.5 MEDIUM MLflow CrewAI autologging records LLM provider API keys in logged trace spans

IV. Related Vulnerabilities

Same product: mlflow
Same vendor: mlflow
Same weakness: CWE-94