CVE-2026-42400 | THREATINT

Description

Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user can send a specially crafted compressed request payload that is processed prior to authorization checks, causing excessive memory and CPU resource consumption that can result in a Kibana instance becoming unresponsive or crashing.

PUBLISHED Reserved 2026-04-27 | Published 2026-05-28 | Updated 2026-05-29 | Assigner elastic

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-400 Uncontrolled Resource Consumption

Product status

Default status

unaffected

9.4.0 (semver)

affected

9.0.0 (semver)

affected

8.0.0 (semver)

affected

References

discuss.elastic.co/...4-2-security-update-esa-2026-35/386554

cve.org (CVE-2026-42400)

nvd.nist.gov (CVE-2026-42400)

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