{"id":"CVE-2026-42241","state":"PUBLISHED","title":"ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width","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.","publishedAt":"2026-05-07T18:52:06.773Z","updatedAt":"2026-05-08T21:30:27.110Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["G-Research ParquetSharp"],"affected":[{"vendor":"G-Research","product":"ParquetSharp","versions":[{"version":">= 18.1.0, < 23.0.0.1","status":"affected"}]}],"references":["https://github.com/G-Research/ParquetSharp/security/advisories/GHSA-rrjr-v56m-ww88","https://github.com/G-Research/ParquetSharp/releases/tag/23.0.0.1"],"weaknesses":["CWE-789"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/42xxx/CVE-2026-42241.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42241","state":"PUBLISHED","datePublished":"2026-05-07T18:52:06.773Z","dateUpdated":"2026-05-08T21:30:27.110Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-25T05:37:12.118Z"},"containers":{"cna":{"title":"ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"G-Research","product":"ParquetSharp","versions":[{"version":">= 18.1.0, < 23.0.0.1","status":"affected"}]}],"references":[{"url":"https://github.com/G-Research/ParquetSharp/security/advisories/GHSA-rrjr-v56m-ww88","name":"https://github.com/G-Research/ParquetSharp/security/advisories/GHSA-rrjr-v56m-ww88","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/G-Research/ParquetSharp/releases/tag/23.0.0.1","name":"https://github.com/G-Research/ParquetSharp/releases/tag/23.0.0.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-789","lang":"en","description":"CWE-789: Memory Allocation with Excessive Size Value","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-07T18:52:06.773Z"},"source":{"advisory":"GHSA-rrjr-v56m-ww88","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-08T14:38:23.750570Z","id":"CVE-2026-42241","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-08T21:30:27.110Z"}}]}}}