CVE-2026-94396Network attack vectorHinoki check available

Authenticated service interruption

Published Sep 26, 2026 · Updated Sep 26, 2026

Resource exhaustion in Elastic Elasticsearch 9.2.0 through 9.4.6 and 9.5.0 through 9.5.3 allows remote authenticated users to interrupt service. Elastic identifies excessive allocation but has not disclosed the affected component, attacker-controlled input, or operation that allocates resources without an effective bound. All configurations are affected, but exploitation requires an authenticated user and has no reported confidentiality or integrity impact.

CVSS severity6.5
Medium
EPSS probability0.42%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource exhaustion in Elastic Elasticsearch 9.2.0 through 9.4.6 and 9.5.0 through 9.5.3 allows remote authenticated users to interrupt service. Elastic identifies excessive allocation but has not disclosed the affected component, attacker-controlled input, or operation that allocates resources without an effective bound. All configurations are affected, but exploitation requires an authenticated user and has no reported confidentiality or integrity impact.

The record

CVE
CVE-2026-94396
Published
Sep 26, 2026
Updated
Sep 26, 2026
Vendor
Elastic
Product
Elasticsearch
Classifications
CWE-400, CAPEC-130, T1499.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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=9.2.0 <=9.4.6
  2. Affected versionversion=9.5.0 <=9.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Elastic · Elasticsearchversion=9.2.0 <=9.4.6; version=9.5.0 <=9.5.3

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CAPEC-130Excessive Allocation
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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