CVE-2026-72628

EUVD-2026-69564

01.09.2026, 20:17

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.

Data Amplification

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	6.5 MEDIUM	NETWORK	LOW	LOW	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 39.31%

Affected Products (NVD)

Vendor	Product	Version
elastic	kibana	8.19.0 ≤ 𝑥 < 8.19.21
elastic	kibana	9.0.0 ≤ 𝑥 < 9.4.6
elastic	kibana	9.5.0 ≤ 𝑥 < 9.5.2

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
The software does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.

References

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