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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 Reserved 2026-04-25 | Published 2026-05-07 | Updated 2026-05-08 | Assigner GitHub_M




MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem types

CWE-789: Memory Allocation with Excessive Size Value

Product status

>= 18.1.0, < 23.0.0.1
affected

References

github.com/...tSharp/security/advisories/GHSA-rrjr-v56m-ww88

github.com/G-Research/ParquetSharp/releases/tag/23.0.0.1

cve.org (CVE-2026-42241)

nvd.nist.gov (CVE-2026-42241)

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