CVE-2026-56149

Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service

State: Published
Severity: 4.9 Medium
Published: Jul 1, 2026
Updated: Jul 1, 2026
Reserved: Jun 19, 2026

Description

Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable.

Scores

CVSS	Score	Vector	Source
3.1	4.9 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H	elastic

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

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-2026-43

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