CVE-2026-42399 | THREATINT

Description

Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated low-privileged user can cause Kibana to consume exponentially increasing amounts of memory by submitting a specially crafted Timelion visualization expression containing deeply chained function calls. The resulting data structure grows without bound, exhausting available memory and causing the Kibana service to crash and become unavailable to all users.

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

8.0.0 (semver)

affected

9.0.0 (semver)

affected

References

discuss.elastic.co/...3-5-security-update-esa-2026-36/386556

cve.org (CVE-2026-42399)

nvd.nist.gov (CVE-2026-42399)

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