What is CVE-2026-42241?

CVE-2026-42241 is a medium-severity vulnerability in G-research Parquetsharp, classified under CWE-789. CVSS score: 5.3/10. Published 2026-05-07.

How severe is CVE-2026-42241?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in G-research Parquetsharp

CVE-2026-42241

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 dec…

EPSS: 0.001 (16.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

G-research Parquetsharp — versions >= 18.1.0, < 23.0.0.1

Weakness classification (CWE)

CWE-789

References

https://github.com/G-Research/ParquetSharp/security/advisories/GHSA-rrjr-v56m-ww88 (x_refsource_CONFIRM)
https://github.com/G-Research/ParquetSharp/releases/tag/23.0.0.1 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-42241?: CVE-2026-42241 is a medium-severity vulnerability in G-research Parquetsharp, classified under CWE-789. CVSS score: 5.3/10. Published 2026-05-07.
How severe is CVE-2026-42241?: Medium severity. CVSS v3 base score is 5.3 out of 10.