Stack Overflow Vulnerability in ParquetSharp .NET Library
CVE-2026-42241

5.3MEDIUM

Key Information:

Vendor

G-research

Status
Parquetsharp
Vendor
CVE Published:
7 May 2026

What is CVE-2026-42241?

The ParquetSharp library, utilized for handling Apache Parquet files in .NET applications, has a vulnerability in the DecimalConverter.ReadDecimal function that can lead to a stack overflow. This issue arises when an attacker controls the value used in a stack allocation, potentially causing service disruption in environments where untrusted Parquet files are processed. The vulnerability affects versions 18.1.0 through 22.0.3 and has been resolved in version 23.0.0.1. Users are strongly advised to upgrade their dependencies to mitigate this risk.

Affected Version(s)

ParquetSharp >= 18.1.0, < 23.0.0.1

References

https://github.com/G-Research/ParquetSharp/security/advis...
x_refsource_CONFIRM
https://github.com/G-Research/ParquetSharp/releases/tag/2...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.