Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/G-Research/ParquetSharp/releases/tag/23.0.0.1
- https://github.com/G-Research/ParquetSharp/security/advisories/GHSA-rrjr-v56m-ww
FAQ
What is CVE-2026-42241?
CVE-2026-42241 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 atta...
How severe is CVE-2026-42241?
CVE-2026-42241 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42241?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.