What is CVE-2026-42397?

CVE-2026-42397 is a medium-severity vulnerability in Elastic Kibana, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-07-21.

How severe is CVE-2026-42397?

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

Resource exhaustion in Elastic Kibana

CVE-2026-42397

Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user can submit a specially crafted request to affected Entity Analytics endpoi…

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 9.4.0, 9.3.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security@elastic.co

Frequently asked questions

What is CVE-2026-42397?: CVE-2026-42397 is a medium-severity vulnerability in Elastic Kibana, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-07-21.
How severe is CVE-2026-42397?: Medium severity. CVSS v3 base score is 6.5 out of 10.