---
id: CVE-2026-8147
aliases:
  - GHSA-2cm6-r77w-6g96
  - BIT-mlflow-2026-8147
title: 'MLflow: trace API endpoints lack proper authorization validators'
summary: 'MLflow: trace API endpoints lack proper authorization validators'
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'
vendor: mlflow
product: mlflow
ecosystem: pip
affected:
  - 'mlflow >= 2.14.0rc0, < 3.13.0rc0'
patched:
  - mlflow 3.13.0rc0
published: '2026-07-02'
updated: '2026-08-13'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-2cm6-r77w-6g96'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-8147'
  - url: 'https://github.com/mlflow/mlflow/pull/23014'
  - url: >-
      https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937
  - url: 'https://github.com/mlflow/mlflow'
  - url: 'https://github.com/mlflow/mlflow/releases/tag/v3.13.0'
  - url: 'https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5'
tags:
  - osv
  - pip
epss: 0.00548
epssPercentile: 0.44757
ingestedAt: '2026-08-13T19:18:20.303Z'
---

## Overview

In MLflow versions prior to 3.13.0, when running with authentication enabled, the trace API endpoints lack proper authorization validators. This allows any authenticated user to bypass experiment-level authorization controls on all trace operations, including reading, deleting, and modifying traces on experiments they do not have permission to access. The issue arises from the `_before_request` handler, which does not register authorization validators for trace endpoints, resulting in requests proceeding without validation. This vulnerability can expose sensitive data, destroy audit logs, and allow unauthorized modifications.

## Affected packages

- `mlflow >= 2.14.0rc0, < 3.13.0rc0`

## Remediation

Upgrade to a patched release:

- `mlflow 3.13.0rc0`