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CVE-2026-102411— Allocation of Resources Without Limits or Throttling 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.

在 Elasticsearch 中存在“资源分配无限制或未进行速率控制（CWE-770）”漏洞，可能导致通过“过度分配（CAPEC-130）”引发的拒绝服务攻击。Elasticsearch 对每个单独模板资源中用户提供的元数据字段大小实施了限制，但在同时检索多个此类资源时，并未限制它们所消耗的总内存。拥有 manage_index_templates 集群权限的攻击者可以注册多个资源，每个资源的元数据大小均符合单个限制。当同时检索这些资源时，会将所有元数据值一次性加载到内存中，耗尽可用的堆内存，导致受影响的节点因内

CVSS 6.5 · Medium

Affected Version Matrix 3

VendorProduct Version RangeStatus
Elastic Elasticsearch 8.0.0≤ 8.19.22 affected
9.0.0≤ 9.4.6 affected
9.5.0≤ 9.5.2 affected
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I. Basic Information for CVE-2026-102411

Vulnerability Information
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Vulnerability Title
Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to Denial of Service via Excessive Allocation (CAPEC-130). Elasticsearch enforces a size limit on the user-supplied metadata field for each individual template resource, but does not limit the total memory used when multiple such resources are retrieved together. A user holding the *manage_index_templates* cluster privilege can register multiple resources each within the individual limit. Retrieving them together materializes all of their metadata values in memory at once, exhausting available heap and causing the affected node to fail with an out-of-memory error, resulting in a denial of 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
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Elastic Elasticsearch 8.0.0 ~ 8.19.22 -

II. Public POCs for CVE-2026-102411

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III. Intelligence Information for CVE-2026-102411

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Other References for CVE-2026-102411 (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-2026-102404 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-2026-103006 6.5 MEDIUM Uncontrolled Recursion 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-770

V. Comments for CVE-2026-102411

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