{"schemaVersion":3,"id":"CVE-2026-41486","aliases":["GHSA-mw35-8rx3-xf9r","PYSEC-2026-2272","PYSEC-2026-2296","CGA-62x6-gwg4-2f58","CGA-j5rr-35h9-g445","CGA-j7qp-xmxx-9g7c"],"status":"published","duplicateOf":null,"title":null,"description":"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.arrow_tensor, ray.data.arrow_tensor_v2, ray.data.arrow_variable_shaped_tensor) globally in PyArrow. When PyArrow reads a Parquet file containing one of these extension types, it calls __arrow_ext_deserialize__ on the field's metadata bytes. Ray's implementation passes these bytes directly to cloudpickle.loads(), achieving arbitrary code execution during schema parsing, before any row data is read. 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