ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | ParquetSharp | >= 18.1.0, < 23.0.0.1 | 23.0.0.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-789- Platform
- .NET (NuGet)
- Package
ParquetSharp- Disclosed
- 24.04.2026
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-rrjr-v56m-ww88 - CC BY 4.0
Vulnerability history: ParquetSharp
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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