{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72636","assignerOrgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","state":"PUBLISHED","assignerShortName":"elastic","dateReserved":"2026-08-10T11:17:29.887Z","datePublished":"2026-08-13T19:14:03.131Z","dateUpdated":"2026-08-13T20:26:48.047Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Elasticsearch","vendor":"Elastic","versions":[{"status":"affected","versionType":"semver","version":"8.0.0","lessThanOrEqual":"8.19.19"},{"status":"affected","versionType":"semver","version":"9.0.0","lessThanOrEqual":"9.4.4"}]}],"descriptions":[{"lang":"en","value":"Uncontrolled Recursion (CWE-674) in the Elasticsearch wildcard matching helper can lead to a denial of service via Excessive Allocation (CAPEC-130). The matcher used to resolve wildcard patterns against names is implemented recursively and had no bound on recursion depth or on the total number of match operations performed. A search request containing a wildcard pattern with a large number of wildcard groups, evaluated against a sufficiently long name, exhausts the thread stack. Elasticsearch treats a stack overflow as an unrecoverable condition and shuts the node down, so the request terminates the affected node rather than failing gracefully.","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>Uncontrolled Recursion (CWE-674) in the Elasticsearch wildcard matching helper can lead to a denial of service via Excessive Allocation (CAPEC-130). The matcher used to resolve wildcard patterns against names is implemented recursively and had no bound on recursion depth or on the total number of match operations performed. A search request containing a wildcard pattern with a large number of wildcard groups, evaluated against a sufficiently long name, exhausts the thread stack. Elasticsearch treats a stack overflow as an unrecoverable condition and shuts the node down, so the request terminates the affected node rather than failing gracefully.</p>"}]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-674","description":"CWE-674 Uncontrolled Recursion","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","shortName":"elastic","dateUpdated":"2026-08-13T19:14:03.131Z"},"references":[{"url":"https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-security-update-esa-2026-133/389499"}],"source":{"discovery":"Elastic"},"title":"Uncontrolled Recursion in Elasticsearch Wildcard Matching Leading to Denial of Service","x_generator":{"engine":"Elastic CVE Publisher 1.0.0"},"impacts":[{"capecId":"CAPEC-130","descriptions":[{"lang":"en","value":"CAPEC-130 Excessive Allocation"}]}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T19:29:20.698857Z","id":"CVE-2026-72636","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":"2026-08-13T20:26:48.047Z"}}]}}