Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-115886— MLflow: SSRF on unauthenticated MLflow servers via third-party scorer kwargs in the scorer invoke, register, and GenAI evaluate endpoints

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、大型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 版本中，scorer 的 invoke、register 以及 GenAI evaluate 接口（包括未认证的 POST /ajax-api/3.0/mlflow/scorer/invoke 端点）会接受第三方 scorer 的序列化数据，并通过 Scorer.model_validate_json 进行解析。该解析过程依赖模块路径白名单，但未对选定的类及其构造函数参数施加限制。当系统安装了

CVSS 6.5 · Medium
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-115886

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
MLflow: SSRF on unauthenticated MLflow servers via third-party scorer kwargs in the scorer invoke, register, and GenAI evaluate endpoints
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, the scorer invoke, register, and GenAI evaluate endpoints, including unauthenticated POST /ajax-api/3.0/mlflow/scorer/invoke, accept serialized third-party scorer data that Scorer.model_validate_json resolves using a module-path allowlist without constraining the selected class or its constructor arguments. When optional trulens and trulens-providers-litellm packages are installed, an attacker can select mlflow.genai.scorers.trulens, choose a model URI outside MLflow's native provider registry so execution uses the LiteLLM fallback, and supply api_base and api_key values that cause the server to send an outbound request to an attacker-chosen or internal host with attacker-controlled headers and body. The vulnerable deserialization occurs before a tracking-store lookup or job submission. 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:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用外部可控制的输入来选择类或代码(不安全的反射)
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-2026-115886

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-115886

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-115886 (2)

Vendor Advisories for CVE-2026-115886 (1)

Vendor Pages for CVE-2026-115886 (1)

IV. Related Vulnerabilities

Same product: mlflow
Same vendor: mlflow
Same weakness: CWE-470

V. Comments for CVE-2026-115886

No comments yet

Leave a comment