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Vulnerability record · CVE-2026-2651 · published 25 May 2026

CVE-2026-2651: Lfprojects mlflow missing authorization vulnerability

Lfprojects · Mlflow

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.

9.0 CVSS 3.1 Critical EPSS 0.54% · top 57.1% CWE-862 · Missing authorizationCWE-1220 · CWE-1220
9.0CVSS 3.1 base score
0.54%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
21 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f Patch
https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc ExploitThird Party Advisory
https://access.redhat.com/security/cve/CVE-2026-2651
https://bugzilla.redhat.com/show_bug.cgi?id=2481117
https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc ExploitThird Party Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2651.json

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-2651), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.