Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service
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 request that causes excessive memory consumption, which may render the affected node unavailable.
Affected Versions:
- 8.x: All versions from 8.0.0 up to and including 8.19.19
- 9.x: All versions from 9.0.0 up to and including 9.2.8
Affected Configurations:
All configurations are affected.
Solutions and Mitigations:
The issue is resolved in Elasticsearch versions 8.19.20 and 9.3.0 and greater.
For Users that Cannot Upgrade:
There are no workarounds for this vulnerability.
Indicators of Compromise (IOC)
No specific indicators of compromise have been identified for this vulnerability.
Elastic Cloud Serverless
Due to our continuous deployment and patching model, the vulnerability described in this security advisory was remediated in our Elastic Cloud Serverless offering before the public disclosure.
Severity: CVSSv3.1: Medium ( 4.9 ) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVE ID: CVE-2026-56143
Problem Type: CWE-770 - Allocation of Resources Without Limits or Throttling
Impact: CAPEC-130 - Excessive Allocation