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CVE-2026-78607— Missing Authorization in Elasticsearch Leading to Information Disclosure

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.

Elastic Elasticsearch是荷兰Elastic公司开源的一款分布式搜索与分析引擎。 Elastic Elasticsearch 8.0.0版本至8.19.18版本、9.0.0版本至9.3.7版本、9.4.0版本至9.4.3版本和9.5.0版本存在授权问题漏洞，该漏洞源于自定义推理服务存在授权缺失问题，可能导致仅持有推理执行权限的用户将出站推理流量定向至任意目的地，并导致管理员配置的凭据泄露。

CVSS 5.4 · Medium EPSS 0.33% · P24

Affected Version Matrix 4

VendorProduct Version RangeStatus
Elastic Elasticsearch 8.0.0≤ 8.19.18 affected
9.0.0≤ 9.3.7 affected
9.4.0≤ 9.4.3 affected
9.5.0 affected
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I. Basic Information for CVE-2026-78607

Vulnerability Information
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Vulnerability Title
Missing Authorization in Elasticsearch Leading to Information Disclosure
Source: CVE Program / CVE List V5
Vulnerability Description
Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Elasticsearch 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic Elasticsearch是荷兰Elastic公司开源的一款分布式搜索与分析引擎。 Elastic Elasticsearch 8.0.0版本至8.19.18版本、9.0.0版本至9.3.7版本、9.4.0版本至9.4.3版本和9.5.0版本存在授权问题漏洞，该漏洞源于自定义推理服务存在授权缺失问题，可能导致仅持有推理执行权限的用户将出站推理流量定向至任意目的地，并导致管理员配置的凭据泄露。
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 Elasticsearch 8.0.0 ~ 8.19.18 -

II. Public POCs for CVE-2026-78607

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III. Intelligence Information for CVE-2026-78607

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Vendor Advisories for CVE-2026-78607 (1)

Same Patch Batch · Elastic · 2026-09-01 · 20 CVEs total

CVE-2026-72649 8.8 HIGH Deserialization of Untrusted Data in Elasticsearch Leading to Remote Code Execution
CVE-2026-63137 8.3 HIGH Incorrect Authorization in Kibana Leading to Privilege Escalation
CVE-2026-78592 7.3 HIGH Improper Limitation of a Pathname to a Restricted Directory in Kibana Leading to Unauthori
CVE-2024-14047 7.2 HIGH Improper Link Resolution Before File Access ('Link Following') in Winlogbeat Leading to Ar
CVE-2026-78608 6.5 MEDIUM Missing Authorization in Kibana Leading to Information Disclosure
CVE-2026-33465 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-63138 6.5 MEDIUM Improper Neutralization of Special Elements in Data Query Logic in Kibana Leading to Infor
CVE-2026-72654 6.5 MEDIUM Execution with Unnecessary Privileges in Kibana Leading to Information Disclosure
CVE-2026-72628 6.5 MEDIUM Improper Handling of Highly Compressed Data in Kibana Leading to Denial of Service
CVE-2026-72652 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-72644 6.5 MEDIUM Uncaught Exception in Kibana Leading to Denial of Service
CVE-2026-72682 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-78605 5.9 MEDIUM Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') in Elasticsearch L
CVE-2026-72641 5.4 MEDIUM Incorrect Authorization in Kibana Leading to Unauthorized Modification of Data
CVE-2026-56143 4.9 MEDIUM Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of
CVE-2026-72633 4.3 MEDIUM Incorrect Authorization in Kibana Leading to Unauthorized Disabling of Privilege Monitorin
CVE-2026-78603 4.3 MEDIUM Missing Authorization in Kibana Leading to Unauthorized Disclosure of Fleet Deployment Met
CVE-2026-78597 4.3 MEDIUM Missing Authorization in Kibana Entity Store Leading to Unauthorized API Key Creation
CVE-2026-78606 4.2 MEDIUM Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and De

IV. Related Vulnerabilities

Same product: Elasticsearch
Same vendor: Elastic
Same weakness: CWE-862

V. Comments for CVE-2026-78607

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