{"id":"CVE-2026-103008","revision":null,"records":[{"revision":"233c51c61cdd4fa7a06e5e967c0d0e83","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-103008","aliases":[],"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 request that causes the server to construct and process a deeply nested data structure with no bound on recursion depth. Elasticsearch contains an uncontrolled recursion weakness in how it builds and serializes geometry values produced by scripted runtime fields. Unlike geometry supplied as text, which is subject to a nesting-depth limit, geometry constructed from a script's output is not bounded. An authenticated user with read access to a single index can submit a request defining such a field with a script that produces a deeply nested structure. Processing this request recurses past the available stack space, causing the affected node to terminate. The node does not recover automatically on all deployments and may require manual intervention to restore service.","state":0,"publishedAt":"2026-10-06T19:31:51.863+00:00","modifiedAt":"2026-10-06T19:52:34.232+00:00","affected":[{"ecosystem":"Vendor product","name":"Elasticsearch","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"Elasticsearch\",\n                    \"vendor\": \"Elastic\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"version\": \"8.12.0\",\n                            \"lessThanOrEqual\": \"8.19.22\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"version\": \"9.0.0\",\n                            \"lessThanOrEqual\": \"9.4.7\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"version\": \"9.5.0\",\n                            \"lessThanOrEqual\": \"9.5.4\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-198/390872"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103008","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-103008","identifiers":["CVE-2026-103008"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-11T13:57:33.6529555+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-11T13:57:33.6529555+00:00","lastSuccessAt":"2026-11-11T13:57:33.8250558+00:00","error":null,"lastVerifiedAt":"2026-11-11T13:57:33.8250561+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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