Uncontrolled Recursion in Elasticsearch - CVE-2026-56148
Published: July 2, 2026
Vulnerability identifier: #VU136670
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-2026-56148
CWE-ID: CWE-674
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 recursion in Elasticsearch when processing user-supplied queries. A remote user can submit a specially crafted query to cause a denial of service.
The issue may cause excessive resource consumption and render the affected node unavailable.
Affected software
Elasticsearch
How to mitigate CVE-2026-56148
Install security update from vendor's website.
Elasticsearch - addressed in versions 8.19.17, 9.3.6, 9.4.3