CVE-2026-42241

ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width

Published May 7, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-rrjr-v56m-ww88 ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared G-research
G-research parquetsharp
Vendors & Products G-research
G-research parquetsharp
Type Values Removed Values Added
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.
Title ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width
Weaknesses CWE-789
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 8, 2026, 9:30 PM
Reserved
Apr 25, 2026, 5:37 AM
Status
Deferred
Published
May 7, 2026, 8:16 PM
Modified
Oct 26, 2026, 8:10 PM