{"id":"CVE-2019-16227","aliases":["GHSA-pf3p-v9xp-mrvf","PYSEC-2019-239"],"url":"https://o3.security/vulnerability/CVE-2019-16227","summary":"py-lmdb Invalid write operation","details":"An issue was discovered in py-lmdb 0.97. For certain values of mn_flags, mdb_cursor_set triggers a memcpy with an invalid write operation within mdb_xcursor_init1. NOTE: this outcome occurs when accessing a data.mdb file supplied by an attacker.","published":"2019-09-11T15:15:11.513Z","modified":"2026-07-08T20:15:24.987579Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"lmdb","fixedVersion":null}],"fix":null,"references":[{"type":"EVIDENCE","url":"https://github.com/TeamSeri0us/pocs/tree/master/lmdb/lmdb%20memcpy%20illegal%20dst"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T20:15:24.987579Z"}}