CVE-2026-41486 Ray: Remote Code Execution via Parquet Arrow Extension Type Deserialization

Ray is an AI compute engine. From version 2.54.0 to before version 2.55.0, Ray Data registers custom Arrow extension types ray.data.arrowtensor, ray.data.arrowtensorv2, ray.data.arrowvariableshapedtensor globally in PyArrow. When PyArrow reads a Parquet file containing one of these extension type...

CVE-2026-41486

Ray contains a remote code execution flaw (CVE-2026-41486) observed in Ray 2.49.0–2.54.0 where PyArrow reads Parquet extension types in metadata and Ray passes the bytes to cloudpickle.loads() during schema parsing, enabling arbitrary code execution before any row data is read. The issue affects ...