CVE-2026-2651: MLflow allows unauthorized access to multipart upload endpoints when the `--serve-artifacts` mode is enabled
(updated )
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.
References
- access.redhat.com/security/cve/CVE-2026-2651
- bugzilla.redhat.com/show_bug.cgi?id=2481117
- github.com/advisories/GHSA-8c7q-86fq-vvmh
- github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f
- github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-2220.yaml
- huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc
- nvd.nist.gov/vuln/detail/CVE-2026-2651
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2651.json
Code Behaviors & Features
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