CVE-2026-103006Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
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No exploitation reported and no EPSS estimate yet.
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Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to Denial of Service via a specially crafted, deeply nested request submitted to the aggregation feature of the search API. Elasticsearch contains an uncontrolled recursion weakness in its search aggregation processing. An authenticated user with read access to a single index can submit a specially crafted request containing deeply nested aggregation definitions. Processing this request triggers unbounded recursive execution that exhausts the server process's available resources, causing the affected node to terminate. The node does not recover automatically and requires manual intervention to restore service.
- CVSS
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-674
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- elastic
- NVD analysis
- Analyzed
- Record last updated
- Oct 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Elastic Elasticsearch elastic:elasticsearch (from the name) | from 8.0.0 through 8.19.20; from 9.0.0 through 9.4.5; from 9.5.0 through 9.5.1 | CNA record |
elastic elasticsearch elastic:elasticsearch | from 8.0.0 before 8.19.21; from 9.0.0 before 9.4.6; from 9.5.0 before 9.5.2 | NVD |
References
- https://discuss.elastic.co/t/elasticsearch-8-19-21-9-4-6-9-5-2-security-update-esa-2026-196/390870vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.