BIT-MLFLOW-2026-69146 MLflow: LogInputs endpoint bypasses per-run UPDATE authorization in basic-auth

MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. From 3.13.0 until 3.15.0, LogInputs is absent from BEFOREREQUESTHANDLERS in the mlflow/server/auth package, allowing any authenticated user to call POST /api/2.0/mlflow/runs/log-inputs...

CVE-2026-69148: Missing Authorization

MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, CreateModelVersion accepts a runid or modelid after validatesourcerun or validatesourcemodel in mlflow/server/handlers.py verifies only path containment, allowing...

CVE-2026-2614: Improper Limitation of a Pathname to a Restricted Directory

A vulnerability in the createmodelversion handler of mlflow/server/handlers.py in mlflow/mlflow versions 3.9.0 and earlier allows an unauthenticated remote attacker to read arbitrary files from the server's filesystem. The issue arises when a CreateModelVersion request includes the tag...

CVE-2026-2393: Server-Side Request Forgery (SSRF)

A Server-Side Request Forgery SSRF vulnerability exists in MLflow versions prior to 3.9.0. The createwebhook function in mlflow/server/handlers.py accepts a user-controlled url parameter without validation, and the sendwebhookrequest function in mlflow/webhooks/delivery.py sends HTTP POST request...

EUVD-2025-209100

In the latest version of mlflow/mlflow, when the basic-auth app is enabled, tracing and assessment endpoints are not protected by permission validators. This allows any authenticated user, including those with NOPERMISSIONS on the experiment, to read trace information and create assessments for...

Authentication Bypass on FastAPI Routes (Job API, OTel API) When Basic Auth Enabled

Summary When MLflow is started with authentication enabled --app-name basic-auth and served via uvicorn ASGI, the FastAPI permission middleware only enforces authentication on /gateway/ routes. All other FastAPI routes -- including the Job API /ajax-api/3.0/jobs/ and the OpenTelemetry trace...

CVE-2023-6018

An attacker can overwrite any file on the server hosting MLflow without any authentication...

CVE-2023-6568

A reflected Cross-Site Scripting XSS vulnerability exists in the mlflow/mlflow repository, specifically within the handling of the Content-Type header in POST requests. An attacker can inject malicious JavaScript code into the Content-Type header, which is then improperly reflected back to the us...

CVE-2023-6568: Improper Neutralization of Input During Web Page Generation

A reflected Cross-Site Scripting XSS vulnerability exists in the mlflow/mlflow repository, specifically within the handling of the Content-Type header in POST requests. An attacker can inject malicious JavaScript code into the Content-Type header, which is then improperly reflected back to the us...

CVE-2023-6018

An attacker can overwrite any file on the server hosting MLflow without any authentication...

WS-2023-0114

Users of the MLflow Open Source Project who are hosting the MLflow Model Registry using the "mlflow server" or "mlflow ui" commands using an MLflow version older than MLflow 2.3.1 may be vulnerable to a remote file access exploit if they are not limiting who can query their server for example, by...

GHSA-83FM-W79M-64R5 Remote file access vulnerability in `mlflow server` and `mlflow ui` CLIs

Impact Users of the MLflow Open Source Project who are hosting the MLflow Model Registry using the mlflow server or mlflow ui commands using an MLflow version older than MLflow 2.3.1 may be vulnerable to a remote file access exploit if they are not limiting who can query their server for example,...

Multiple path traversals on Windows hosts

Description validatepathissafe function in file /mlflow/server/handlers.py, introduced in PR 7891 on Feb 24th, 2023 does not account for Windows absolute path format, and thus can be bypassed on MLFlow servers, running on Windows hosts, exposing them to a number of high-impact directory traversal...

Path Traversal

mlflow is vulnerable to Path Traversal. The vulnerability exists due to improper access control in handlers.py which allows an attacker to traverse outside the restricted directory and download arbitrary files on the server. Note that mlflow is only affected if it runs with either mlflow server o...

Remote file existence check vulnerability in `mlflow server` and `mlflow ui` CLIs

Impact Users of the MLflow Open Source Project who are hosting the MLflow Model Registry using the mlflow server or mlflow ui commands using an MLflow version older than MLflow 2.2.1 may be vulnerable to a remote file existence check exploit if they are not limiting who can query their server for...

mlflow is vulnerable to remote file access in `mlflow server` and `mlflow ui` CLIs

Impact Users of the MLflow Open Source Project who are hosting the MLflow Model Registry using the mlflow server or mlflow ui commands using an MLflow version older than MLflow 2.2.1 may be vulnerable to a remote file access exploit if they are not limiting who can query their server for example,...