{"id":"CVE-2026-3172","state":"PUBLISHED","title":"pgvector buffer overflow in parallel HNSW index build","description":"Buffer overflow in parallel HNSW index build in pgvector 0.6.0 through 0.8.1 allows a database user to leak sensitive data from other relations or crash the database server.","publishedAt":"2026-02-25T20:59:10.051Z","updatedAt":"2026-02-26T15:04:08.481Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","source":"PostgreSQL"},"assigner":"PostgreSQL","products":["n/a pgvector"],"affected":[{"vendor":"n/a","product":"pgvector","defaultStatus":"unaffected","versions":[{"version":"0.8.0","status":"affected","lessThan":"0.8.2","versionType":"semver"},{"version":"0.7.0","status":"affected","versionType":"semver"},{"version":"0.6.0","status":"affected","versionType":"semver"}]}],"references":["https://github.com/pgvector/pgvector/issues/959"],"weaknesses":["CWE-191","CWE-787"],"ingestedAt":"2026-10-29T20:11:50.837Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/3xxx/CVE-2026-3172.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-3172","state":"PUBLISHED","datePublished":"2026-02-25T20:59:10.051Z","dateUpdated":"2026-02-26T15:04:08.481Z","assignerShortName":"PostgreSQL","assignerOrgId":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","dateReserved":"2026-02-24T22:42:24.733Z"},"containers":{"cna":{"title":"pgvector buffer overflow in parallel HNSW index build","descriptions":[{"lang":"en","value":"Buffer overflow in parallel HNSW index build in pgvector 0.6.0 through 0.8.1 allows a database user to leak sensitive data from other relations or crash the database server."}],"affected":[{"vendor":"n/a","product":"pgvector","defaultStatus":"unaffected","versions":[{"version":"0.8.0","status":"affected","lessThan":"0.8.2","versionType":"semver"},{"version":"0.7.0","status":"affected","versionType":"semver"},{"version":"0.6.0","status":"affected","versionType":"semver"}]}],"references":[{"url":"https://github.com/pgvector/pgvector/issues/959"}],"metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":8.1,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-191","lang":"en","type":"CWE","description":"Integer Underflow or Wraparound"}]},{"descriptions":[{"cweId":"CWE-787","lang":"en","type":"CWE","description":"Out-of-bounds Write"}]}],"providerMetadata":{"shortName":"PostgreSQL","orgId":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","dateUpdated":"2026-02-25T20:59:10.051Z"},"configurations":[{"lang":"en","value":"attacker has permission to create or reindex an HNSW index with parallel workers"}],"credits":[{"lang":"en","value":"Thanks to chungkn from OneMount Group for reporting this."}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-26T15:03:28.719764Z","id":"CVE-2026-3172","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-26T15:04:08.481Z"}}]}}}