What is CVE-2026-72663?

CVE-2026-72663 is a medium-severity vulnerability in Elastic Kibana, classified under Inefficient Algorithmic Complexity. CVSS score: 6.5/10. Published 2026-08-13.

How severe is CVE-2026-72663?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Elastic Kibana

CVE-2026-72663

Inefficient Algorithmic Complexity (CWE-407) in Kibana can lead to denial of service via Input Data Manipulation (CAPEC-153). A specially crafted, deeply nested expression submitted to a Kibana TSVB visualization is evaluated with a worst-case cost that grows disproportionately with the size of the input. Because the evaluation runs synchronously, a single request consumes the Kibana request-processing thread indefinitely, and Kibana stops responding to all further requests until the service is restarted.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Elastic Kibana — versions 8.0.0, 9.0.0

Weakness classification (CWE)

CWE-407 — Inefficient Algorithmic Complexity

References

security@elastic.co

Frequently asked questions

What is CVE-2026-72663?: CVE-2026-72663 is a medium-severity vulnerability in Elastic Kibana, classified under Inefficient Algorithmic Complexity. CVSS score: 6.5/10. Published 2026-08-13.
How severe is CVE-2026-72663?: Medium severity. CVSS v3 base score is 6.5 out of 10.