CVE-2026-42241
ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-789 |
| Vendor | g-research |
| Product | parquetsharp |
| Published | May 7, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
G-Research / ParquetSharp
>= 18.1.0, < 23.0.0.1