{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63140","assignerOrgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","state":"PUBLISHED","assignerShortName":"elastic","dateReserved":"2026-07-15T18:23:57.166Z","datePublished":"2026-07-21T21:04:01.143Z","dateUpdated":"2026-07-22T19:40:22.260Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Elasticsearch","vendor":"Elastic","versions":[{"lessThanOrEqual":"9.3.7","status":"affected","version":"9.0.0","versionType":"semver"},{"lessThanOrEqual":"9.4.3","status":"affected","version":"9.4.0","versionType":"semver"},{"lessThanOrEqual":"8.19.18","status":"affected","version":"8.0.0","versionType":"semver"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>Reachable Assertion (CWE-617) in Elasticsearch can lead to denial of service via Input Data Manipulation (CAPEC-153). A specially crafted search request containing a null value in a specific query clause causes an internal assertion to be raised during query parsing. Because Elasticsearch treats assertion failures as fatal errors, this terminates the affected node process. A low-privileged authenticated user with read access to at least one index can exploit this condition with a single request to cause a node to terminate, disrupting search availability. In a single-node deployment this fully stops Elasticsearch; in a multi-node cluster it reduces cluster capacity for each affected node.</p>"}],"value":"Reachable Assertion (CWE-617) in Elasticsearch can lead to denial of service via Input Data Manipulation (CAPEC-153). A specially crafted search request containing a null value in a specific query clause causes an internal assertion to be raised during query parsing. Because Elasticsearch treats assertion failures as fatal errors, this terminates the affected node process. A low-privileged authenticated user with read access to at least one index can exploit this condition with a single request to cause a node to terminate, disrupting search availability. In a single-node deployment this fully stops Elasticsearch; in a multi-node cluster it reduces cluster capacity for each affected node."}],"impacts":[{"capecId":"CAPEC-153","descriptions":[{"lang":"en","value":"CAPEC-153 Input Data Manipulation"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseSeverity":"MEDIUM","baseScore":6.5,"confidentialityImpact":"NONE","integrityImpact":"NONE","scope":"UNCHANGED","userInteraction":"NONE","privilegesRequired":"LOW","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-617","description":"CWE-617 Reachable Assertion","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","shortName":"elastic","dateUpdated":"2026-07-21T21:04:01.143Z"},"references":[{"url":"https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-64/388565"}],"source":{"discovery":"Elastic"},"title":"Reachable Assertion in Elasticsearch Leading to Denial of Service","x_generator":{"engine":"Elastic CVE Publisher 0.0.1"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-22T19:31:58.094155Z","id":"CVE-2026-63140","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":"2026-07-22T19:40:22.260Z"}}]}}