Allocation of Resources Without Limits or Throttling in Kibana - CVE-2026-42397
Published: July 22, 2026
Vulnerability identifier: #VU139137
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-2026-42397
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 Entity Analytics endpoints when handling specially crafted requests containing oversized input values. A remote user can submit a specially crafted request containing an oversized input value to cause a denial of service.
Only deployments that use the affected Entity Analytics functionality are vulnerable.
Affected software
Kibana
How to mitigate CVE-2026-42397
Install security update from vendor's website.
Kibana - addressed in versions 9.3.7, 9.4.4