Medium severity5.3GHSA Advisory· Published May 7, 2026· Updated May 7, 2026
CVE-2026-42241
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
ParquetSharpNuGet | >= 18.1.0, < 23.0.0.1 | 23.0.0.1 |
Affected products
2- Range: >= 18.1.0, < 23.0.0.1
Patches
Vulnerability mechanics
References
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