{"id":"CVE-2026-42241","summary":"ParquetSharp: Possible Stack Overflow When Reading a ParquetFile with Large Decimal Type Width","details":"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.","aliases":["GHSA-rrjr-v56m-ww88"],"modified":"2026-08-12T03:51:43.469281402Z","published":"2026-05-07T18:52:06.773Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-789"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42241.json"},"references":[{"type":"WEB","url":"https://github.com/G-Research/ParquetSharp/releases/tag/23.0.0.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42241.json"},{"type":"ADVISORY","url":"https://github.com/G-Research/ParquetSharp/security/advisories/GHSA-rrjr-v56m-ww88"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42241"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/g-research/parquetsharp","events":[{"introduced":"f0ee0b90b4156f1b526e592d8fc1df641b663d81"},{"fixed":"d87081931cdecfd2e4401909ecefd220b3ee2a91"}],"database_specific":{"extracted_events":[{"introduced":"18.1.0"},{"fixed":"23.0.0.1"},{"introduced":"0"}],"source":["AFFECTED_FIELD","DESCRIPTION","REFERENCES"]}}],"versions":["23.0.0","23.0.0-beta1","21.0.0","21.0.0-beta1","20.0.0","20.0.0-beta2","20.0.0-beta1","19.0.1","19.0.1-beta1","18.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42241.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}