CVE-2026-56148

Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

State: Published
Severity: 6.5 Medium
Published: Jul 1, 2026
Updated: Jul 1, 2026
Reserved: Jun 19, 2026

Description

Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user can submit a specially crafted query that causes excessive resource consumption while the request is processed, which may render the affected node unavailable.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	elastic

Weaknesses

CWE-674 Uncontrolled Recursion

Affected Products

Product	Versions
ElasticsearchElastic	9.4.0 through 9.4.2Affected 9.0.0 through 9.3.5Affected 8.0.0 through 8.19.16Affected

References

https://discuss.elastic.co/t/elasticsearch-8-19-17-9-3-6-9-4-3-security-update-esa-2026-42

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