{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-120147", "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "state": "PUBLISHED", "assignerShortName": "PostgreSQL", "dateReserved": "2026-10-30T22:45:08.383Z", "datePublished": "2026-11-12T14:15:25.141Z", "dateUpdated": "2026-11-12T14:15:25.141Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "shortName": "PostgreSQL", "dateUpdated": "2026-11-12T14:15:25.141Z"}, "title": "PostgreSQL dblink reentrant disconnect use-after-free executes arbitrary code", "x_postgresql": {"component": "contrib module"}, "descriptions": [{"lang": "en", "value": "Use after free in the PostgreSQL dblink extension allows an object creator to execute arbitrary code as the operating system user running the database, via type conversion code that re-enters dblink and closes a connection whose results an outer dblink call is reading. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected."}], "affected": [{"defaultStatus": "unaffected", "product": "PostgreSQL", "vendor": "n/a", "versions": [{"lessThan": "18.7", "status": "affected", "version": "18", "versionType": "rpm"}, {"lessThan": "17.12", "status": "affected", "version": "17", "versionType": "rpm"}, {"lessThan": "16.16", "status": "affected", "version": "16", "versionType": "rpm"}, {"lessThan": "15.20", "status": "affected", "version": "15", "versionType": "rpm"}, {"lessThan": "14.25", "status": "affected", "version": "0", "versionType": "rpm"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-416", "type": "CWE", "description": "Use After Free"}]}], "references": [{"url": "https://www.postgresql.org/support/security/CVE-2026-120147/"}], "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 issued \"CREATE EXTENSION dblink\". Attacker has permission to create objects (temporary objects or non-temporary objects in at least one schema)."}], "credits": [{"lang": "en", "value": "The PostgreSQL project thanks \uc548\uc9c0\uc6a9 for reporting this problem."}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "PostgreSQL", "vendor": "n/a", "versions": [{"lessThan": "18.7", "status": "affected", "version": "18", "versionType": "rpm"}, {"lessThan": "17.12", "status": "affected", "version": "17", "versionType": "rpm"}, {"lessThan": "16.16", "status": "affected", "version": "16", "versionType": "rpm"}, {"lessThan": "15.20", "status": "affected", "version": "15", "versionType": "rpm"}, {"lessThan": "14.25", "status": "affected", "version": "0", "versionType": "rpm"}]}], "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in the PostgreSQL dblink extension allows an object creator to execute arbitrary code as the operating system user running the database, via type conversion code that re-enters dblink and closes a connection whose results an outer dblink call is reading. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected."}], "id": "CVE-2026-120147", "lastModified": "2026-11-12T19:02:35.830", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "type": "Secondary"}]}, "published": "2026-11-12T15:17:43.317", "references": [{"source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "url": "https://www.postgresql.org/support/security/CVE-2026-120147/"}], "sourceIdentifier": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "type": "Secondary"}]}

{"bugzilla": {"description": "postgresql: postgresql: Arbitrary code execution via use-after-free in dblink extension", "id": "2572559", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2572559"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the PostgreSQL dblink extension. A use-after-free vulnerability allows an authenticated database user with object creation privileges to execute arbitrary code as the operating system user running the database. This flaw is triggered when custom type conversion logic re-enters the dblink extension and closes an active connection while an outer query is still reading its results."], "mitigation": {"lang": "en:us", "value": "If the dblink extension is not required by your applications, remove it from all affected databases using the following command in a psql session:\nDROP EXTENSION IF EXISTS dblink CASCADE;\nIf the extension is required, mitigate exposure by preventing untrusted database users from defining custom objects (such as types and functions), for example by revoking create privileges on public schemas:\nREVOKE CREATE ON SCHEMA public FROM PUBLIC;\nAdditionally, revoke execute permissions on dblink functions from untrusted roles.\nCaveats: Dropping the extension or revoking schema permissions will break applications and automated tasks that rely on dblink cross-database queries or object creation. These SQL operations take effect immediately and do not require a database service restart or reload."}, "name": "CVE-2026-120147", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "libpq", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "postgresql17", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "postgresql18", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-11-12T14:15:25Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-120147\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-120147\nhttps://www.postgresql.org/support/security/CVE-2026-120147/"], "statement": "Red Hat has evaluated this vulnerability as an Important severity risk because an authenticated database user capable of creating database objects can achieve arbitrary code execution under the operating system identity of the PostgreSQL server daemon. While the flaw permits severe host-level compromise, exploitation is bounded by the prerequisite of having existing database access, permissions to declare custom types, and an active installation of the optional dblink extension. In standard Red Hat Enterprise Linux configurations, dblink is not enabled by default.", "threat_severity": "Important"}

{}