CVE-2026-72676Network attack vector

Privileged script execution via unsafe output identifier

Published Aug 13, 2026 · Updated Aug 13, 2026

Code injection in Elastic Fleet Server allows remote authenticated users to execute server-side scripts through crafted output identifiers. Kibana accepts unsafe characters in an output configuration identifier, and Fleet Server interpolates the identifier into a script during agent policy processing instead of treating it as data. High-privilege output-configuration access is required; successful injection executes attacker-controlled script content that can expose or alter data.

CVSS severity6.5
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Elastic Fleet Server allows remote authenticated users to execute server-side scripts through crafted output identifiers. Kibana accepts unsafe characters in an output configuration identifier, and Fleet Server interpolates the identifier into a script during agent policy processing instead of treating it as data. High-privilege output-configuration access is required; successful injection executes attacker-controlled script content that can expose or alter data.

The record

CVE
CVE-2026-72676
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Elastic
Product
Fleet Server
Classifications
CWE-94, CAPEC-242, T1059
Attack vector
network
Privileges
admin

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=8.5.0 <=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 privilegesadmin

What is affected?

Elastic · Fleet Serverversion=8.5.0 <=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:H/UI:N/S:U/C:H/I:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CAPEC-242Code Injection
T1059Command and Scripting Interpreter

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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