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CVE-2026-41486

Ray: Remote Code Execution via Parquet Arrow Extension Type Deserialization PUBLISHED

Description (CNA)

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. This issue has been patched in version 2.55.0.

Affected (CNA)

Vendor / productVersions
ray-project / rayaffected >= 2.54.0, < 2.55.0

CWE

CWE-94, CWE-502

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.