CVE-2026-72657Network attack vector

Policy disclosure via unchecked artifact assignment key

Published Aug 13, 2026 · Updated Aug 13, 2026

Authorization bypass in Elastic Fleet Server allows remote authenticated users with enrolled-agent credentials to read unassigned policies. The artifact-download decision persists a client-supplied assignment key without comparing it with the requesting agent's server-side assignment. The issue affects all configurations of 8.3.0 through 8.19.19, 9.0.0 through 9.4.4, and 9.5.0; access is limited to policies outside that agent's assignment.

CVSS severity6.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Elastic Fleet Server allows remote authenticated users with enrolled-agent credentials to read unassigned policies. The artifact-download decision persists a client-supplied assignment key without comparing it with the requesting agent's server-side assignment. The issue affects all configurations of 8.3.0 through 8.19.19, 9.0.0 through 9.4.4, and 9.5.0; access is limited to policies outside that agent's assignment.

The record

CVE
CVE-2026-72657
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Elastic
Product
Fleet Server
Classifications
CWE-639, CAPEC-77
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=8.3.0 <=8.19.19
  2. Affected versionversion=9.0.0 <=9.4.4
  3. Affected versionversion=9.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Elastic · Fleet Serverversion=8.3.0 <=8.19.19; version=9.0.0 <=9.4.4; version=9.5.0

Published CVSS scores

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

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-639Authorization Bypass Through User-Controlled Key
CAPEC-77Manipulating User-Controlled Variables

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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