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    <link>https://cve.radiocsirt.org</link>
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    <lastBuildDate>Wed, 07 Oct 2026 21:17:20 +0000</lastBuildDate>
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      <title>CVE-2026-41486 — Ray: Remote Code Execution via Parquet Arrow Extension Type Deserialization</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-41486</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; ray-project ray&lt;/p&gt;
&lt;p&gt;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&amp;#39;s metadata bytes. Ray&amp;#39;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; ray-project ray&lt;/p&gt;
&lt;p&gt;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&amp;#39;s metadata bytes. Ray&amp;#39;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.&lt;/p&gt;</content:encoded>
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