CVE-2026-56148

MEDIUM

Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

Title source: cna

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.

References (1)

Core 1

Core References

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

Scores

CVSS v3 6.5

EPSS 0.0035

EPSS Percentile 26.8%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-674

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