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      <title>CVE-2026-42241 — ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-42241</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; G-Research ParquetSharp&lt;/p&gt;
&lt;p&gt;ParquetSharp is a .NET library for reading and writing Apache Parquet files. From version 18.1.0 to before version 23.0.0.1, DecimalConverter.ReadDecimal makes a stackalloc using what might be an attacker-supplied value. If an attacker declares a decimal column with some unreasonable width, this could lead to a stack overflow. In a service environment, this would potentially take down a service. This affects applications using ParquetSharp to read untrusted Parquet files in a network service. This issue has been patched in version 23.0.0.1.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; G-Research ParquetSharp&lt;/p&gt;
&lt;p&gt;ParquetSharp is a .NET library for reading and writing Apache Parquet files. From version 18.1.0 to before version 23.0.0.1, DecimalConverter.ReadDecimal makes a stackalloc using what might be an attacker-supplied value. If an attacker declares a decimal column with some unreasonable width, this could lead to a stack overflow. In a service environment, this would potentially take down a service. This affects applications using ParquetSharp to read untrusted Parquet files in a network service. This issue has been patched in version 23.0.0.1.&lt;/p&gt;</content:encoded>
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