A vulnerability in mlflow/mlflow versions 3.9.0 and earlier allows unauthenticated access to certain FastAPI routes when the server is started with authentication enabled (`--app-name basic-auth`) and served via uvicorn (ASGI). The FastAPI permission middleware only enforces authentication on `/gateway/` routes, leaving other routes such as the Job API (`/ajax-api/3.0/jobs/*`) and the OpenTelemetry trace ingestion API (`/v1/traces`) unprotected. This allows unauthenticated remote attackers to submit jobs, read job results, cancel running jobs, and inject arbitrary trace data into experiments. The issue arises from an architectural mismatch between Flask and FastAPI authentication mechanisms, where the `_find_fastapi_validator()` function fails to handle non-`/gateway/` paths, resulting in a complete authentication bypass. This vulnerability is fixed in version 3.10.0.

MLflow versions prior to 3.11.0 are vulnerable to an authentication bypass vulnerability that allows attackers to access protected resources without proper authentication. This vulnerability arises from a flaw in the authentication mechanism, which can be exploited by attackers to gain unauthorized access to sensitive data and functionalities within the MLflow platform. This detection is included in the AI and LLM category.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A vulnerability in mlflow/mlflow versions 3.9.0 and earlier allows unauthenticated access to certain
    FastAPI routes when the server is started with authentication enabled (`--app-name basic-auth`) and served
    via uvicorn (ASGI). The FastAPI permission middleware only enforces authentication on `/gateway/` routes,
    leaving other routes such as the Job API (`/ajax-api/3.0/jobs/*`) and the OpenTelemetry trace ingestion
    API (`/v1/traces`) unprotected. This allows unauthenticated remote attackers to submit jobs, read job
    results, cancel running jobs, and inject arbitrary trace data into experiments. The issue arises from an
    architectural mismatch between Flask and FastAPI authentication mechanisms, where the
    `_find_fastapi_validator()` function fails to handle non-`/gateway/` paths, resulting in a complete
    authentication bypass. This vulnerability is fixed in version 3.10.0. (CVE-2026-2652)

ID	Name	Product	Family	Type	Severity
115253	MLflow < 3.11.0 Authentication Bypass	Web App Scanning	Artificial Intelligence	Check Based	high
442308	SCA: security update for mlflow (GHSA-75cm-x2w3-8mgf)	Tenable Cloud Security	SCA Checks	Local	high
442308	SCA: security update for mlflow (GHSA-75cm-x2w3-8mgf)	Tenable Self-Hosted Container Security	SCA Checks	Local	high

Detections

Analytics

CVE-2026-2652

high

Tenable Plugins

high

high

high