CVE-2026-103006: Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to Denial of Service via a specially crafted, deeply nested request submitted to the aggregation…

PriorityP339medium6.5CVSS 3.1

AVNACLPRLUINSUCNINAH

EPSS

0.40%

32.3th percentile

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.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
elastic	elasticsearch	8.0.0 – 8.19.20	—
elastic	elasticsearch	9.0.0 – 9.4.5	—
elastic	elasticsearch	9.5.0 – 9.5.1	—

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.