CVE-2026-56149 MEDIUM

CVE-2026-56149: Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service

Vendor Elastic
Product Elasticsearch
Weakness CWE-770 · Uncontrolled resource consumption
Published July 1, 2026
Last update July 1, 2026
View on NVD All CVEs

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 1, 2026 CVE published
July 1, 2026 Record updated

Related vulnerabilities

04Related CVE

CVE-2026-56150 Allocation of Resources Without Limits or Throttling in Fleet Server Leading to Denial of Service CVE-2026-46673 Russh: Unchecked CryptoVec allocation and growth handling is reachable from local agent inputs in current russh releases and from remote SSH traffic in historical pre-0.58.0 releases CVE-2026-42570 Svelte devalue: DoS via sparse array deserialization CVE-2026-54428 Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK CVE-2026-53423 Unauthenticated denial-of-service via BEAM atom table exhaustion in membrane_mp4_plugin