CVE-2026-6637

{"id": "CVE-2026-6637", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-6637", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-05-14T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "affectedData": [{"vendor": "n/a", "product": "PostgreSQL", "versions": [{"status": "affected", "version": "18", "lessThan": "18.4", "versionType": "rpm"}, {"status": "affected", "version": "17", "lessThan": "17.10", "versionType": "rpm"}, {"status": "affected", "version": "16", "lessThan": "16.14", "versionType": "rpm"}, {"status": "affected", "version": "15", "lessThan": "15.18", "versionType": "rpm"}, {"status": "affected", "version": "0", "lessThan": "14.23", "versionType": "rpm"}], "defaultStatus": "unaffected"}]}], "published": "2026-05-14T14:16:25.820", "references": [{"url": "https://www.postgresql.org/support/security/CVE-2026-6637/", "tags": ["Patch", "Vendor Advisory"], "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "description": [{"lang": "en", "value": "CWE-89"}, {"lang": "en", "value": "CWE-121"}]}], "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."}], "lastModified": "2026-06-17T11:01:08.343", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C432AE18-DD50-40EB-B46A-9283F30081DA", "versionEndExcluding": "14.23"}, {"criteria": "cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9D8D994F-ABAB-4AC2-992F-320F4868698D", "versionEndExcluding": "15.18", "versionStartIncluding": "15.0"}, {"criteria": "cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B58AE3D3-E1C9-45D2-AA92-A3D135B77A8A", "versionEndExcluding": "16.14", "versionStartIncluding": "16.0"}, {"criteria": "cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A19538E9-DBB9-4396-AC04-17943E82C411", "versionEndExcluding": "17.10", "versionStartIncluding": "17.0"}, {"criteria": "cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F8DB17ED-67AD-41F2-B272-27AF5B4FA2B0", "versionEndExcluding": "18.4", "versionStartIncluding": "18.0"}], "operator": "OR"}]}], "sourceIdentifier": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"}