CVE-2026-42241 — ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width
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 usin…
Published: 2026-05-07 · CVSS: 5.3 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7