{"schemaVersion":3,"id":"CVE-2026-72647","aliases":["CGA-5r63-wp2f-hm7r","CGA-9v38-jr34-8xqp","CGA-c25r-2xxh-w9c3","CGA-qhmr-72j3-3vjj"],"status":"published","duplicateOf":null,"title":"Uncontrolled Recursion in Elasticsearch Leading to Denial of Service","description":"Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Serialized Data with Nested Payloads (CAPEC-230). An authenticated user holding only read privileges on a single index can submit one specially crafted search request whose deeply nested structure is processed without a depth limit, exhausting the thread stack and terminating the affected node.","dates":{"published":"2026-08-13T19:13:36.195Z","modified":"2026-08-13T20:28:40.601Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Chainguard","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0042,"percentile":0.35251,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0.12399999999999997,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.00296},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.0042,"percentile":0.35251}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00296,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0042,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.0042,"percentile":0.35251}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-674","name":"Uncontrolled Recursion","description":"The product does not properly control the amount of recursion that takes place,  consuming excessive resources, such as allocated memory or the program stack.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/674.html"}],"affected":[{"vendor":"chainguard","product":"elasticsearch-9.2","name":"elasticsearch-9.2","label":"elasticsearch-9.2","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/elasticsearch-9.2","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"chainguard","product":"elasticsearch-9.3","name":"elasticsearch-9.3","label":"elasticsearch-9.3","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/elasticsearch-9.3","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"elastic","product":"elasticsearch","name":"Elasticsearch","label":"elasticsearch","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 8.0.0, ≤ 8.19.19","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.0.0, ≤ 9.4.4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 8.0.0, < 8.19.20","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.0.0, < 9.4.5","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 8.0.0, ≤ 8.19.19 | ≥ 9.0.0, ≤ 9.4.4 | ≥ 8.0.0, < 8.19.20 | ≥ 9.0.0, < 9.4.5","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"elasticsearch","label":"Elasticsearch","category":"database"}},"hubHref":"/vendor/elastic/elasticsearch"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-118/389497","label":"discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-118/389497","hostname":"discuss.elastic.co","tags":["WEB","Vendor Advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72647.json","label":"github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72647.json","hostname":"github.com","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72647","label":"nvd.nist.gov/vuln/detail/CVE-2026-72647","hostname":"nvd.nist.gov","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-08-13T19:13:36.195Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-13T20:28:40.601Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T21:48:26.726Z","stale":false,"partial":false}}