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Kibana CVE-2026-72628

| EUVDEUVD-2026-69564 MEDIUM
Improper Handling of Highly Compressed Data (Data Amplification) (CWE-409)
2026-09-01 elastic GHSA-x7p2-xrmv-3p2x
Denial Of Service Elastic Kibana
6.5
CVSS 3.1 · Vendor: elastic
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Severity by source

Vendor (elastic) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
6.5 MEDIUM

Network-reachable via API, low complexity, but PR:L is correct as Streams management privileges are explicitly required; no confidentiality or integrity impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (elastic).

CVSS VectorVendor: elastic

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Sep 01, 2026 - 19:59 vuln.today
CVE Published
Sep 01, 2026 - 19:20 cve.org
MEDIUM 6.5

DescriptionCVE.org

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.

AnalysisAI

Denial of service in Kibana allows an authenticated user holding Streams management privileges to crash the Kibana process by submitting specially crafted compressed content that expands to a disproportionately large volume during server-side processing, exhausting available memory. The host OS terminates the Kibana process, and the service remains unavailable to all users until manually restarted. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated Kibana session with Streams management privileges specifically - this is not a general low-privilege user role but a specific management capability that must be explicitly assigned. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 6.5 score reflects a genuine medium-severity issue: network-reachable (AV:N), low complexity (AC:L), low-privilege authenticated (PR:L), with high availability impact (A:H) but no confidentiality or integrity loss. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade Kibana to version 8.19.21, 9.4.6, or 9.5.2 as documented in Elastic Security Advisory ESA-2026-125 at https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-2-security-update-esa-2026-125/390090. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-72628 vulnerability details – vuln.today
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