Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization in the /mlflow-artifacts/mpu/ endpoints in --serve-artifacts mode. An attacker can gain unauthorized access to and overwrite artifacts belonging to other users by manipulating artifactpath and pathfilename argument...

CVE-2026-2651

MLflow CVE-2026-2651 describes missing authorization validation for MPU endpoints under /mlflow-artifacts/mpu/* when serve-artifacts is enabled. Vulnerable in MLflow versions

Missing Authorization Validation on MLflow MPU Endpoints Leads to Cross-Resource Artifact Overwrite, Model Poisoning, and Cross-Boundary Command Execution on Model Load

Analyzed version: 5af88dc08a54d40dddfc019da9e7f0fd0fcf34e2 git describe: nightly-2300-g5af88dc08, local mlflow.version: 3.10.1.dev0 In --serve-artifacts mode, MLflow exposes MPU endpoints for large-file multipart uploads. However, its authorization logic only covers the /mlflow-artifacts/artifact...