Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Lfprojects | Mlflow | <= 3.10.1 |
Related Weaknesses (CWE)
References
- https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966fPatch
- https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dcExploitThird 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-fa98f78f83dcExploitThird Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2651.json
FAQ
What is CVE-2026-2651?
CVE-2026-2651 is a vulnerability with a CVSS score of 9.0 (CRITICAL). 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 r...
How severe is CVE-2026-2651?
CVE-2026-2651 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-2651?
Check the references section above for vendor advisories and patch information. Affected products include: Lfprojects Mlflow.