CVE-2026-2651 | THREATINT

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.

PUBLISHED Reserved 2026-02-18 | Published 2026-05-25 | Updated 2026-05-26 | Assigner @huntr_ai

CRITICAL: 9.0CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Problem types

CWE-862 Missing Authorization

Product status

Any version before 3.10.0

affected

References

huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc exploit

huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc

github.com/...ommit/d7290811d8f3c95366d80109424edc1fb1ad966f

cve.org (CVE-2026-2651)

nvd.nist.gov (CVE-2026-2651)

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