CVE-2026-56149

MEDIUM

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

Title source: cna

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.

References (1)

Core 1

Core References

https://discuss.elastic.co/t/elasticsearch-8-19-17-9-3-6-9-4-3-security-update-esa-2026-43

Scores

CVSS v3 4.9

EPSS 0.0032

EPSS Percentile 24.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-770

Status published

Products (4)

Elastic/Elasticsearch 8.0.0 - 8.19.16

elastic/elasticsearch 8.0.0 - 8.19.17

Elastic/Elasticsearch 9.0.0 - 9.3.5

Elastic/Elasticsearch 9.4.0 - 9.4.2

Published Jul 01, 2026

Tracked Since Jul 01, 2026