Resource exhaustion in Elasticsearch - CVE-2026-94396
Published: September 25, 2026
Vulnerability identifier: #VU152231
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-94396
CWE-ID: CWE-400
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 uncontrolled resource consumption in Elasticsearch when processing requests. A remote user can cause excessive allocation to cause a denial of service.
All configurations are affected.
Affected software
Elasticsearch
How to mitigate CVE-2026-94396
Install security update from vendor's website.
Elasticsearch - addressed in versions 9.4.7, 9.5.4