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.
Published: 2026-05-07
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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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

Fri, 08 May 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Thu, 07 May 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared G-research
G-research parquetsharp
Vendors & Products G-research
G-research parquetsharp

Thu, 07 May 2026 19:30:00 +0000

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'}


Subscriptions

G-research Parquetsharp
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-08T21:30:27.110Z

Reserved: 2026-04-25T05:37:12.118Z

Link: CVE-2026-42241

cve-icon Vulnrichment

Updated: 2026-05-08T14:38:31.554Z

cve-icon NVD

Status : Deferred

Published: 2026-05-07T20:16:44.247

Modified: 2026-05-07T20:37:54.060

Link: CVE-2026-42241

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-07T21:24:24Z

Weaknesses