CVE-2026-8147
Authorization Bypass in mlflow/mlflow
Description
In MLflow versions prior to 3.14.0, 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.
INFO
Published Date :
July 2, 2026, 9:16 a.m.
Last Modified :
July 6, 2026, 4:46 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.0 | HIGH | [email protected] |
Solution
- Update MLflow to version 3.14.0 or later.
- Verify authorization controls for trace API endpoints.
- Implement experiment-level authorization checks.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-8147.
| URL | Resource |
|---|---|
| https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937 | Patch |
| https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5 | Exploit Third Party Advisory |
| https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5 | Exploit Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-8147 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-8147
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-8147 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-8147 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 06, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:* versions up to (excluding) 3.14.0 Added Reference Type huntr.dev: https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937 Types: Patch Added Reference Type huntr.dev: https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5 Types: Exploit, Third Party Advisory Added Reference Type CISA-ADP: https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5 Types: Exploit, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 02, 2026
Action Type Old Value New Value Added Reference https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5 Added SSVC {'id': 'CVE-2026-8147', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-02T12:28:27.236676Z'} -
New CVE Received by [email protected]
Jul. 02, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'mlflow', 'product': 'mlflow/mlflow', 'versions': [{'status': 'affected', 'version': 'unspecified', 'lessThan': '3.14.0', 'versionType': 'custom'}]}] Added Description In MLflow versions prior to 3.14.0, 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. Added CVSS V3 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-284 Added Reference https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937 Added Reference https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5