Inefficient Algorithmic Complexity in Kibana - CVE-2026-72663
Published: August 13, 2026
Vulnerability identifier: #VU142348
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-2026-72663
CWE-ID: CWE-407
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 inefficient algorithmic complexity in the TSVB visualization expression evaluator when processing a specially crafted, deeply nested expression. A remote user can submit a specially crafted expression to cause a denial of service.
Because the evaluation runs synchronously, a single request can consume the Kibana request-processing thread indefinitely until the service is restarted.
Affected software
Kibana
How to mitigate CVE-2026-72663
Install security update from vendor's website.
Kibana - addressed in versions 8.19.20, 9.4.5