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CVE-2026-103006— Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

Quick assessment

Affected
Elastic Elasticsearch
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.

Elasticsearch 中存在不受控递归漏洞（CWE-674），攻击者可通过向搜索 API 的聚合功能提交特制的深层嵌套请求，导致拒绝服务（Denial of Service）。该漏洞源于 Elasticsearch 在搜索聚合处理过程中存在不受控的递归缺陷。具备单索引只读权限的已认证用户可构造并提交包含深层嵌套聚合定义的特制请求。处理此类请求会触发无界递归执行，耗尽服务器进程可用资源，从而导致受影响的节点终止。该节点无法自动恢复，必须通过人工干预才能恢复服务。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 3

VendorProduct Version RangeStatus
Elastic Elasticsearch 8.0.0≤ 8.19.20 affected
9.0.0≤ 9.4.5 affected
9.5.0≤ 9.5.1 affected
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I. Basic Information for CVE-2026-103006

Vulnerability Information
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Vulnerability Title
Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to Denial of Service via a specially crafted, deeply nested request submitted to the aggregation feature of the search API. Elasticsearch contains an uncontrolled recursion weakness in its search aggregation processing. An authenticated user with read access to a single index can submit a specially crafted request containing deeply nested aggregation definitions. Processing this request triggers unbounded recursive execution that exhausts the server process's available resources, causing the affected node to terminate. The node does not recover automatically and requires manual intervention to restore service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Elastic Elasticsearch 8.0.0 ~ 8.19.20 -

II. Public POCs for CVE-2026-103006

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III. Intelligence Information for CVE-2026-103006

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Other References for CVE-2026-103006 (1)

Same Patch Batch · Elastic · 2026-10-06 · 14 CVEs total

CVE-2026-102406 8.8 HIGH Authorization Bypass Through User-Controlled Key in Kibana Leading to Cross-Tenant Data In
CVE-2026-103007 7.2 HIGH Incorrect Authorization in Elasticsearch Leading to Privilege Escalation
CVE-2026-103009 7.1 HIGH Authorization Bypass Through User-Controlled Key in Elasticsearch Leading to Information D
CVE-2026-102412 6.5 MEDIUM Incorrect Authorization in Kibana Leading to Sensitive Information Disclosure
CVE-2026-102409 6.5 MEDIUM Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
CVE-2026-102411 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of
CVE-2026-102404 6.5 MEDIUM Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
CVE-2026-103008 6.5 MEDIUM Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
CVE-2026-103005 6.5 MEDIUM Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service
CVE-2026-102413 6.2 MEDIUM Uncaught Exception in Elastic Endpoint Leading to Denial of Service
CVE-2026-102407 5.4 MEDIUM Incorrect Authorization in Elasticsearch Leading to Unauthorized Data Stream Modification
CVE-2026-102410 4.3 MEDIUM Missing Authorization in Kibana Leading to Information Disclosure
CVE-2026-102408 4.3 MEDIUM Inefficient Regular Expression Complexity in Elasticsearch Leading to Denial of Service

IV. Related Vulnerabilities

Same product: Elasticsearch
Same vendor: Elastic
Same weakness: CWE-674

V. Comments for CVE-2026-103006

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