CVE-2026-72653Network attack vectorHinoki check available

Authenticated service hang via malformed maintenance-window payload

Published Aug 13, 2026 · Updated Aug 13, 2026

Resource exhaustion in Elastic Kibana allows remote authenticated users to hang the service via a malformed maintenance-window payload. The maintenance-window handler accepts a specially crafted malformed payload and allocates resources without an enforced limit, leaving the Kibana process unresponsive. Exploitation requires permission to manage maintenance windows; every configuration is affected, and recovery requires manual intervention.

CVSS severity6.5
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource exhaustion in Elastic Kibana allows remote authenticated users to hang the service via a malformed maintenance-window payload. The maintenance-window handler accepts a specially crafted malformed payload and allocates resources without an enforced limit, leaving the Kibana process unresponsive. Exploitation requires permission to manage maintenance windows; every configuration is affected, and recovery requires manual intervention.

The record

CVE
CVE-2026-72653
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Elastic
Product
Kibana
Classifications
CWE-770, CAPEC-130, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.12.0 <=8.19.18
  2. Affected versionversion=9.0.0 <=9.3.7
  3. Affected versionversion=9.4.0 <=9.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Elastic · Kibanaversion=8.12.0 <=8.19.18; version=9.0.0 <=9.3.7; version=9.4.0 <=9.4.3

Published CVSS scores

6.5ElasticCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CAPEC-130Excessive Allocation
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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