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CVE-2026-72676— Improper Control of Generation of Code in Fleet Server Leading to Code Injection

Quick assessment

Affected
Elastic Fleet Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Elastic Fleet Server是荷兰Elastic公司开源的一个集中管理代理服务器的服务组件。 Elastic Fleet Server 8.5.0版本至8.19.19版本、9.0.0版本至9.4.4版本和9.5.0版本存在代码注入漏洞，该漏洞源于Kibana接收输出配置的标识符时未限制为安全字符，该标识符被放入Fleet Server构建的服务器端脚本中，导致嵌入的脚本语法被执行，可能执行攻击者提供的脚本内容。

CVSS 6.5 · Medium EPSS 0.55% · P44

Affected Version Matrix 3

VendorProduct Version RangeStatus
Elastic Fleet Server 8.5.0≤ 8.19.19 affected
9.0.0≤ 9.4.4 affected
9.5.0 affected
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I. Basic Information for CVE-2026-72676

Vulnerability Information
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Vulnerability Title
Improper Control of Generation of Code in Fleet Server Leading to Code Injection
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Control of Generation of Code ('Code Injection') (CWE-94) in Fleet Server can lead to the execution of attacker-supplied script content via Code Injection (CAPEC-242). Kibana accepted an identifier for an output configuration without restricting it to safe characters. That identifier is later placed into a server-side script that Fleet Server builds as part of routine agent policy processing, so script syntax embedded in the identifier became part of the script that was executed rather than being treated as data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Fleet Server 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic Fleet Server是荷兰Elastic公司开源的一个集中管理代理服务器的服务组件。 Elastic Fleet Server 8.5.0版本至8.19.19版本、9.0.0版本至9.4.4版本和9.5.0版本存在代码注入漏洞，该漏洞源于Kibana接收输出配置的标识符时未限制为安全字符，该标识符被放入Fleet Server构建的服务器端脚本中，导致嵌入的脚本语法被执行，可能执行攻击者提供的脚本内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Elastic Fleet Server 8.5.0 ~ 8.19.19 -

II. Public POCs for CVE-2026-72676

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III. Intelligence Information for CVE-2026-72676

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Vendor Advisories for CVE-2026-72676 (1)

Same Patch Batch · Elastic · 2026-08-13 · 48 CVEs total

CVE-2026-72642 8.8 HIGH Use of Out-of-range Pointer Offset in the Elasticsearch Machine Learning Native Inference
CVE-2026-72665 8.1 HIGH Missing Authorization in Kibana Leading to Unauthorized Execution of Host Response Actions
CVE-2026-72670 7.7 HIGH Exposure of Sensitive Information to an Unauthorized Actor in Kibana Leading to Disclosure
CVE-2026-72672 7.7 HIGH Incorrect Authorization in Kibana Leading to Disclosure of Elastic Defend Endpoint Event D
CVE-2026-72669 7.6 HIGH Missing Authorization in Kibana Leading to Cross-User Information Disclosure and Data Tamp
CVE-2026-72658 7.3 HIGH Cross-Site Request Forgery in Kibana Leading to Privilege Escalation
CVE-2026-72677 7.3 HIGH Relative Path Traversal in Kibana Fleet Leading to Unauthorized Deletion of Users and Othe
CVE-2026-72675 7.1 HIGH Missing Authorization in Kibana Machine Learning Leading to Cross-Space Information Disclo
CVE-2026-72629 7.1 HIGH Authorization Bypass Through User-Controlled Key in Kibana Leading to Cross-Space Access t
CVE-2026-72632 7.1 HIGH Observable Discrepancy in Kibana Fleet Leading to Disclosure of Elastic Agent Elasticsearc
CVE-2026-72630 7.1 HIGH Incorrect Authorization in Kibana Fleet Leading to Privilege Escalation
CVE-2026-72643 7.1 HIGH Incorrect Authorization in Kibana Agent Builder Leading to Disclosure and Tampering of Pri
CVE-2026-72666 6.8 MEDIUM Authorization Bypass Through User-Controlled Key in Kibana Leading to Unauthorized Query E
CVE-2026-72631 6.5 MEDIUM Improper Privilege Management in Kibana Fleet Leading to Over-Scoped Elastic Agent API Key
CVE-2026-72661 6.5 MEDIUM Missing Authorization in Kibana Leading to Information Disclosure
CVE-2026-49089 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-72684 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of
CVE-2026-72663 6.5 MEDIUM Inefficient Algorithmic Complexity in Kibana Leading to Denial of Service
CVE-2026-72636 6.5 MEDIUM Uncontrolled Recursion in Elasticsearch Wildcard Matching Leading to Denial of Service
CVE-2026-72657 6.5 MEDIUM Authorization Bypass Through User-Controlled Key in Fleet Server Leading to Information Di

Showing top 20 of 48 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Fleet Server
Same vendor: Elastic
Same weakness: CWE-94

V. Comments for CVE-2026-72676

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