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EUVD-2026-309272

fkie_cve-2026-42241

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.

GHSA-rrjr-v56m-ww88 — ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width

Affected: NuGet: ParquetSharp

`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.