{"id":"CVE-2026-63144","state":"PUBLISHED","title":"Uncontrolled Recursion in Elasticsearch Leading to Denial of Service","description":"Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via a specially crafted search request submitted by a low-privileged authenticated user. A user with read-level index access can submit a request that triggers unbounded recursive processing within the Elasticsearch query evaluation component, causing a fatal error that terminates the affected node. In single-node deployments, this results in complete service outage; in multi-node clusters, it causes repeated node restarts and sustained availability degradation.","publishedAt":"2026-07-21T22:26:43.138Z","updatedAt":"2026-07-22T13:27:01.544Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"elastic"},"assigner":"elastic","products":["Elastic Elasticsearch"],"affected":[{"vendor":"Elastic","product":"Elasticsearch","defaultStatus":"unaffected","versions":[{"version":"9.4.0","status":"affected","lessThanOrEqual":"9.4.3","versionType":"semver"},{"version":"9.3.0","status":"affected","lessThanOrEqual":"9.3.7","versionType":"semver"},{"version":"8.19.0","status":"affected","lessThanOrEqual":"8.19.18","versionType":"semver"}]}],"references":["https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-68/388571"],"weaknesses":["CWE-674"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63144.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63144","state":"PUBLISHED","datePublished":"2026-07-21T22:26:43.138Z","dateUpdated":"2026-07-22T13:27:01.544Z","assignerShortName":"elastic","assignerOrgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","dateReserved":"2026-07-15T18:23:57.166Z"},"containers":{"cna":{"title":"Uncontrolled Recursion in Elasticsearch Leading to Denial of Service","descriptions":[{"lang":"en","value":"Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via a specially crafted search request submitted by a low-privileged authenticated user. A user with read-level index access can submit a request that triggers unbounded recursive processing within the Elasticsearch query evaluation component, causing a fatal error that terminates the affected node. In single-node deployments, this results in complete service outage; in multi-node clusters, it causes repeated node restarts and sustained availability degradation."}],"affected":[{"vendor":"Elastic","product":"Elasticsearch","defaultStatus":"unaffected","versions":[{"version":"9.4.0","status":"affected","lessThanOrEqual":"9.4.3","versionType":"semver"},{"version":"9.3.0","status":"affected","lessThanOrEqual":"9.3.7","versionType":"semver"},{"version":"8.19.0","status":"affected","lessThanOrEqual":"8.19.18","versionType":"semver"}]}],"references":[{"url":"https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-68/388571"}],"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-674","description":"CWE-674 Uncontrolled Recursion","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"elastic","orgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","dateUpdated":"2026-07-21T22:26:43.138Z"},"impacts":[{"capecId":"CAPEC-130","descriptions":[{"lang":"en","value":"CAPEC-130 Excessive Allocation"}]}],"source":{"discovery":"Elastic"},"x_generator":{"engine":"Elastic CVE Publisher 0.0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-22T13:23:19.625583Z","id":"CVE-2026-63144","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-22T13:27:01.544Z"}}]}}}