CVE-2026-116333

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-116333", "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "state": "PUBLISHED", "assignerShortName": "PostgreSQL", "dateReserved": "2026-10-26T04:01:48.585Z", "datePublished": "2026-11-12T14:15:19.133Z", "dateUpdated": "2026-11-12T21:45:33.350Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "shortName": "PostgreSQL", "dateUpdated": "2026-11-12T14:15:19.133Z"}, "title": "PostgreSQL parallel B-tree array scan reads beyond array bounds", "x_postgresql": {"component": "core server"}, "descriptions": [{"lang": "en", "value": "Buffer over-read in PostgreSQL parallel B-tree scans allows an object creator to read attacker-chosen server-memory addresses, via a function incorrectly marked PARALLEL SAFE or STABLE to make participating workers build different scan-key arrays. Within major versions 17-18, minor versions before PostgreSQL 18.7 and 17.12 are affected. Versions before PostgreSQL 17 are unaffected."}], "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"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-126", "type": "CWE", "description": "Buffer Over-read"}]}], "references": [{"url": "https://www.postgresql.org/support/security/CVE-2026-116333/"}], "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:N", "baseScore": 6.5, "baseSeverity": "MEDIUM"}}], "configurations": [{"lang": "en", "value": "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 Claude and Ada Logics for reporting this problem."}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-12T21:19:33.982665Z", "id": "CVE-2026-116333", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-12T21:45:33.350Z"}}]}}

{}

{"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"}]}], "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Buffer over-read in PostgreSQL parallel B-tree scans allows an object creator to read attacker-chosen server-memory addresses, via a function incorrectly marked PARALLEL SAFE or STABLE to make participating workers build different scan-key arrays. Within major versions 17-18, minor versions before PostgreSQL 18.7 and 17.12 are affected. Versions before PostgreSQL 17 are unaffected."}], "id": "CVE-2026-116333", "lastModified": "2026-11-12T22:18:27.923", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-116333", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-12T21:19:33.982665Z", "version": "2.0.3"}}]}, "published": "2026-11-12T15:17:41.920", "references": [{"source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "url": "https://www.postgresql.org/support/security/CVE-2026-116333/"}], "sourceIdentifier": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-126"}], "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "type": "Secondary"}]}

{"bugzilla": {"description": "postgresql: postgresql: Information disclosure via buffer over-read in parallel B-tree scans", "id": "2572535", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2572535"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in PostgreSQL. An authenticated database user with permission to create database objects can trigger a buffer over-read during parallel B-tree index scans by defining a function incorrectly marked as parallel safe or stable. This issue causes participating worker processes to generate inconsistent search keys, allowing the attacker to read arbitrary server memory and resulting in sensitive information disclosure."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue without applying code fixes, parallel query execution can be disabled to prevent PostgreSQL from launching parallel workers for index scans:\n1. Disable parallel worker processes by setting `max_parallel_workers_per_gather` to `0`. This can be applied across the instance by executing the following SQL command as an administrative user:\nALTER SYSTEM SET max_parallel_workers_per_gather = 0;\nSELECT pg_reload_conf();\nAlternatively, add or modify the setting in `/var/lib/pgsql/data/postgresql.conf`:\nmax_parallel_workers_per_gather = 0\nThen reload the PostgreSQL service:\nsystemctl reload postgresql\n2. As a supplementary operational control, restrict `CREATE` permissions on schemas and databases to trusted administrators to prevent untrusted users from declaring custom functions.\nCaveats:\nDisabling parallel query execution forces queries to run in a single process, which can degrade query performance on analytical workloads or large table scans.\nWarning: Reloading PostgreSQL configuration files will apply changes to new queries and sessions without dropping active connections, but query execution characteristics will change immediately."}, "name": "CVE-2026-116333", "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": "2026-11-12T14:15:19Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-116333\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-116333\nhttps://www.postgresql.org/support/security/CVE-2026-116333/"], "statement": "This vulnerability is rated as Moderate severity because exploitation requires an authenticated database user with permissions to create custom functions, limiting unauthorized remote access. While an attacker can trigger out-of-bounds memory reads via manipulated parallel query scans, the flaw does not grant write access, data modification, or direct code execution. Earlier major database releases supported across standard enterprise platforms do not implement the vulnerable parallel scan mechanism and are not susceptible to this flaw.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[18,18.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[17,17.12)"}}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "PostgreSQL", "source": "cna", "vendor": "n/a"}, "product": "postgresql", "vendor": "postgresql"}], "created": "2026-11-12T23:30:10.627000+00:00", "updated": "2026-11-13T06:00:08.956929+00:00", "vendors": ["postgresql", "postgresql$PRODUCT$postgresql"]}