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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
mlflow mlflow/mlflow
unspecified to < 3.10.0affected
References
- https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc ↗
- https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f ↗
- https://access.redhat.com/security/cve/CVE-2026-2651 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2481117 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2651.json ↗