{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-116366", "assignerOrgId": "cb7ba516-3b07-4c98-b0c2-715220f1a8f6", "state": "PUBLISHED", "assignerShortName": "ClickHouse", "dateReserved": "2026-10-26T07:54:23.069Z", "datePublished": "2026-10-30T11:00:11.115Z", "dateUpdated": "2026-10-30T11:00:11.115Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "cb7ba516-3b07-4c98-b0c2-715220f1a8f6", "shortName": "ClickHouse", "dateUpdated": "2026-10-30T11:00:11.115Z"}, "title": "Unauthenticated RCE vulnerability against ClickHouse Server", "datePublic": "2026-10-30T10:59:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-190", "description": "CWE-190 Integer overflow or wraparound", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-248", "descriptions": [{"lang": "en", "value": "CAPEC-248 Command Injection"}]}], "affected": [{"vendor": "ClickHouse", "product": "ClickHouse", "platforms": ["x86", "arm"], "collectionURL": "https://packages.clickhouse.com/", "packageName": "ClickHouse", "repo": "https://github.com/ClickHouse/clickhouse", "versions": [{"status": "affected", "version": "26.3", "lessThan": "26.3.62.3-lts", "versionType": "custom"}, {"status": "affected", "version": "26.8", "lessThan": "26.8.36.3-lts", "versionType": "custom"}, {"status": "affected", "version": "26.9", "lessThan": "26.9.27.3-stable", "versionType": "custom"}, {"status": "affected", "version": "26.10", "lessThan": "26.10.3.7-stable", "versionType": "custom"}], "defaultStatus": "affected"}], "descriptions": [{"lang": "en", "value": "An issue has been discovered in ClickHouse Server that, under certain conditions, could allow an unauthenticated user with network access to execute arbitrary code on the ClickHouse Server.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<pre>An issue has been discovered in ClickHouse Server that, under certain conditions, could allow an unauthenticated user with network access to execute arbitrary code on the ClickHouse Server. </pre>"}]}], "references": [{"url": "https://github.com/ClickHouse/ClickHouse/blob/master/SECURITY.md"}, {"url": "https://clickhouse.com/docs/resources/changelogs/security-changelog"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.5, "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"}}], "credits": [{"lang": "en", "value": "Elshad Toklayev", "type": "reporter"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

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