CVE-2026-2651
Missing Authorization Validation in mlflow/mlflow
Description
A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded. The issue is resolved in version 3.10.0.
INFO
Published Date :
May 25, 2026, 7:16 a.m.
Last Modified :
June 4, 2026, 3:41 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.0 | CRITICAL | MITRE-CVE | ||||
| CVSS 3.0 | CRITICAL | [email protected] |
Solution
- Update MLflow to version 3.10.0 or later.
- Ensure artifact endpoint access controls are properly configured.
- Monitor artifact repositories for unauthorized changes.
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-2026-2651.
| URL | Resource |
|---|---|
| https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f | Patch |
| https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc | Exploit Third Party Advisory |
| https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc | 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-2026-2651 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-2026-2651
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-2026-2651 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-2651 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]
Jun. 04, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:* versions up to (including) 3.10.1 Added Reference Type huntr.dev: https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f Types: Patch Added Reference Type CISA-ADP: https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc Types: Exploit, Third Party Advisory Added Reference Type huntr.dev: https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc Types: Exploit, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 26, 2026
Action Type Old Value New Value Added Reference https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc -
New CVE Received by [email protected]
May. 25, 2026
Action Type Old Value New Value Added Description A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded. The issue is resolved in version 3.10.0. Added CVSS V3 AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H Added CWE CWE-862 Added Reference https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f Added Reference https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc