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CVE-2026-63261: CWE-400 Uncontrolled Resource Consumption in Elastic Kibana

0
Medium
VulnerabilityCVE-2026-63261cvecve-2026-63261cwe-400
Published: 07/21/2026 (07/21/2026, 22:58:45 UTC)
Source: CVE Database V5
Vendor/Project: Elastic
Product: Kibana

Description

Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user can send a specially crafted request to a Kibana machine learning feature, causing the server to exhaust available memory and become unavailable to all users.

CVSS v3.1

Score 6.5medium

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

GitHub Actionsmore threats →ai
elastic/kibana
pkg:github/elastic/kibana
Affected versions
=8.0.0=9.0.0=9.4.0

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 07/21/2026, 23:22:51 UTC

Technical Analysis

This vulnerability in Elastic Kibana allows a low-privileged authenticated user to trigger uncontrolled resource consumption via the machine learning feature. By sending a specially crafted request, the attacker can cause excessive memory allocation, leading to denial of service by making the Kibana server unavailable to all users. The CVSS v3.1 base score is 6.5, reflecting a network attack vector with low complexity and no user interaction required, but requiring privileges. No official fix or patch has been confirmed as of the published date.

Potential Impact

Successful exploitation results in denial of service due to memory exhaustion on the Kibana server, impacting availability. Confidentiality and integrity are not affected. The attack requires low-privileged authenticated access, which limits the attacker scope but still poses a significant availability risk.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to Kibana's machine learning features to trusted users only and monitor for unusual memory usage patterns. No official fix or temporary workaround is currently documented.

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Technical Details

Data Version
5.2
Assigner Short Name
elastic
Date Reserved
2026-07-16T03:26:51.579Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a5ffbc59c2644c7f8e8d0f2

Added to database: 07/21/2026, 23:07:49 UTC

Last enriched: 07/21/2026, 23:22:51 UTC

Last updated: 07/22/2026, 00:10:22 UTC

Views: 6

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