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CVE-2026-41486

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.9 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • ray

    Versions
    • >= 2.54.0, < 2.55.0: Affected

    No fix published

  • ray PyPI

    Versions
    • 2.49.0
    • 2.49.1
    • 2.49.2
    • 2.50.0
    • 2.50.1
    • 2.51.0
    • 2.51.1
    • 2.51.2
    • 2.52.0
    • 2.52.1
    • 2.53.0
    • 2.54.0
    • 2.54.1
    Affected ranges
    • ECOSYSTEM: ≥ 2.49.0, < 2.55.0

    Update to 2.55.0

  • ray PyPI

    Versions
    • 0.1.1
    • 0.1.2
    • 0.2.0
    • 0.2.1
    • 0.2.2
    • 0.3.0
    • 0.3.1
    • 0.4.0
    • 0.5.0
    • 0.5.2
    • 0.5.3
    • 0.6.0
    • 0.6.1
    • 0.6.2
    • 0.6.3
    • 0.6.4
    • 0.6.5
    • 0.6.6
    • 0.7.0
    • 0.7.1
    • 0.7.2
    • 0.7.3
    • 0.7.4
    • 0.7.5
    • 0.7.6
    • 0.7.7
    • 0.8.0
    • 0.8.1
    • 0.8.2
    • 0.8.3
    • 0.8.4
    • 0.8.5
    • 0.8.6
    • 0.8.7
    • 1.0.0
    • 1.0.1
    • 1.1.0
    • 1.10.0
    • 1.11.0
    • 1.11.1
    • 1.12.0
    • 1.12.1
    • 1.13.0
    • 1.2.0
    • 1.3.0
    • 1.4.0
    • 1.4.1
    • 1.5.0
    • 1.5.1
    • 1.5.2
    • 1.6.0
    • 1.7.0
    • 1.7.1
    • 1.8.0
    • 1.9.0
    • 1.9.1
    • 1.9.2
    • 2.0.0
    • 2.0.1
    • 2.1.0
    • 2.10.0
    • 2.11.0
    • 2.12.0
    • 2.2.0
    • 2.20.0
    • 2.21.0
    • 2.22.0
    • 2.23.0
    • 2.24.0
    • 2.3.0
    • 2.3.0rc0
    • 2.3.1
    • 2.30.0
    • 2.31.0
    • 2.32.0
    • 2.32.0rc0
    • 2.33.0
    • 2.34.0
    • 2.35.0
    • 2.36.0
    • 2.36.1
    • 2.37.0
    • 2.38.0
    • 2.39.0
    • 2.4.0
    • 2.40.0
    • 2.41.0
    • 2.42.0
    • 2.42.1
    • 2.43.0
    • 2.44.0
    • 2.44.1
    • 2.45.0
    • 2.46.0
    • 2.47.0
    • 2.47.1
    • 2.48.0
    • 2.49.0
    • 2.49.1
    • 2.49.2
    • 2.5.0
    • 2.5.1
    • 2.50.0
    • 2.50.1
    • 2.51.0
    • 2.51.1
    • 2.51.2
    • 2.52.0
    • 2.52.1
    • 2.53.0
    • 2.54.0
    • 2.6.0
    • 2.6.1
    • 2.6.2
    • 2.6.3
    • 2.7.0
    • 2.7.0rc0
    • 2.7.1
    • 2.7.2
    • 2.8.0
    • 2.8.1
    • 2.9.0
    • 2.9.1
    • 2.9.2
    • 2.9.3
    Affected ranges
    • ECOSYSTEM: ≤ 2.54.0

    No fix published

  • ve-ray PyPI

    Versions
    • 2.44.0.1
    • 2.44.0.2
    • 2.46.0.0
    • 2.46.0.1
    • 2.46.0.2
    Affected ranges
    • ECOSYSTEM: ≤ 2.54.0

    No fix published

Original sources

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