CVE-2026-72628

Improper Handling of Highly Compressed Data in Kibana Leading to Denial of Service

State: Published
Severity: 6.5 Medium
Published: Sep 1, 2026
Updated: Sep 1, 2026
Reserved: Aug 10, 2026

Description

Improper Handling of Highly Compressed Data (CWE-409) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user holding Streams management privileges could supply specially crafted content that expands to a far larger volume of data during processing, exhausting the memory available to Kibana. The Kibana process is terminated by the host and remains unavailable to all users until the service is restarted.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	elastic

Weaknesses

CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)

Affected Products

Product	Versions
KibanaElastic	8.19.0 through 8.19.20Affected 9.0.0 through 9.4.5Affected 9.5.0 through 9.5.1Affected

References

https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-2-security-update-esa-2026-125/390090

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