Allocation of Resources Without Limits or Throttling in Elasticsearch - CVE-2026-56143
Published: September 1, 2026
Vulnerability identifier: #VU146654
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-56143
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in Elasticsearch when handling specially crafted requests. A remote privileged user can submit a specially crafted request to cause a denial of service.
The issue may cause excessive memory consumption and render the affected node unavailable.
Affected software
Elasticsearch
How to mitigate CVE-2026-56143
Install security update from vendor's website.
Elasticsearch - addressed in versions 8.19.20, 9.3.0