CVE-2026-42241

Description

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.

CVSS Vector

References

• https://github.com/G-Research/ParquetSharp/releases/tag/23.0.0.1
• https://github.com/G-Research/ParquetSharp/security/advisories/GHSA-rrjr-v56m-ww88