{"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"}}}}