{"id":"CVE-2023-37365","aliases":["GHSA-xwc8-rf6m-xr86","PYSEC-2026-1450"],"url":"https://o3.security/vulnerability/CVE-2023-37365","summary":"hnswlib Double Free vulnerability","details":"Hnswlib 0.7.0 has a double free in init_index when the M argument is a large integer.","published":"2023-06-30T00:00:00Z","modified":"2026-08-12T03:51:40.880611679Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},"epss":{"score":0.00586,"percentile":0.45356,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"hnswlib","fixedVersion":"0.8.0"}],"fix":{"url":"https://github.com/nmslib/hnswlib/pull/484","label":"nmslib/hnswlib#484"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/37xxx/CVE-2023-37365.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-37365"},{"type":"REPORT","url":"https://github.com/nmslib/hnswlib/issues/467"},{"type":"WEB","url":"https://github.com/nmslib/hnswlib/pull/484"},{"type":"WEB","url":"https://github.com/nmslib/hnswlib/commit/f6d170ce0b41f9e75ace473b09df6e7872590757"},{"type":"PACKAGE","url":"https://github.com/nmslib/hnswlib"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:40.880611679Z"}}