PT-2026-44511 · Elastic · Kibana

Ismisepaul + 1 · Published 2026-05-28 · Updated 2026-06-01 · CVE-2026-42400

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Kibana (affected versions not specified)

Description Uncontrolled Resource Consumption in Kibana can lead to a denial of service through excessive allocation. An authenticated user can send a specially crafted compressed request payload that is processed before authorization checks, resulting in excessive memory and CPU consumption that may cause the instance to become unresponsive or crash.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BIT-ELK-2026-42400

BIT-KIBANA-2026-42400

CVE-2026-42400

Affected Products

Kibana

References · 5

• https://osv.dev/vulnerability/BIT-kibana-2026-42400 · Vendor Advisory
• https://discuss.elastic.co/t/kibana-8-19-16-9-3-5-9-4-2-security-update-esa-2026-35/386554 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42400 · Security Note
• https://osv.dev/vulnerability/BIT-elk-2026-42400 · Vendor Advisory
• https://t.me/cveNotify/165472 · Telegram Post