{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-6637","assignerOrgId":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","state":"PUBLISHED","assignerShortName":"PostgreSQL","dateReserved":"2026-04-19T19:58:20.340Z","datePublished":"2026-05-14T13:00:15.223Z","dateUpdated":"2026-05-15T03:56:19.781Z"},"containers":{"cna":{"providerMetadata":{"orgId":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","shortName":"PostgreSQL","dateUpdated":"2026-05-14T13:00:15.223Z"},"title":"PostgreSQL refint allows stack buffer overflow and SQL injection","descriptions":[{"lang":"en","value":"Stack buffer overflow in PostgreSQL module \"refint\" allows an unprivileged database user to execute arbitrary code as the operating system user running the database.  A distinct attack is possible if the application declares a user-controlled column as a \"refint\" cascade primary key and facilitates user-controlled updates to that column.  In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the database user performing the primary key update.  Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected."}],"affected":[{"defaultStatus":"unaffected","product":"PostgreSQL","vendor":"n/a","versions":[{"lessThan":"18.4","status":"affected","version":"18","versionType":"rpm"},{"lessThan":"17.10","status":"affected","version":"17","versionType":"rpm"},{"lessThan":"16.14","status":"affected","version":"16","versionType":"rpm"},{"lessThan":"15.18","status":"affected","version":"15","versionType":"rpm"},{"lessThan":"14.23","status":"affected","version":"0","versionType":"rpm"}]}],"problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-121","type":"CWE","description":"Stack-based Buffer Overflow"},{"lang":"en","cweId":"CWE-89","type":"CWE","description":"Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')"}]}],"references":[{"url":"https://www.postgresql.org/support/security/CVE-2026-6637/"}],"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:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"}}],"configurations":[{"lang":"en","value":"superuser previously installed the refint extension"}],"credits":[{"lang":"en","value":"The PostgreSQL project thanks Nikolay Samokhvalov for reporting this problem."}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-14T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-6637"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-15T03:56:19.781Z"}}]}}