CVE-2026-4818— Some management operations on data streams are not properly restricted when user does not have the necessary privileges
Quick assessment
Affected
floragunn Search Guard FLX
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.
Search Guard FLX是德国Search Guard公司的一个加密、认证和授权系统。 Search Guard FLX 3.0.0至4.0.1版本存在安全漏洞，该漏洞源于权限不足的用户可能对数据流执行某些管理操作。
Possible ATT&CK Techniques 1 AI
T1068.002
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I. Basic Information for CVE-2026-4818
Vulnerability Information
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Vulnerability Title
Some management operations on data streams are not properly restricted when user does not have the necessary privileges
Source: CVE Program / CVE List V5
Vulnerability Description
In Search Guard FLX versions from 3.0.0 up to 4.0.1, there exists an issue which allows users without the necessary privileges to execute some management operations against data streams.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Search Guard FLX 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Search Guard FLX是德国Search Guard公司的一个加密、认证和授权系统。 Search Guard FLX 3.0.0至4.0.1版本存在安全漏洞，该漏洞源于权限不足的用户可能对数据流执行某些管理操作。
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 |
|---|---|---|---|---|
| floragunn | Search Guard FLX | 3.0.0 ~ 4.0.1 | - |
|
II. Public POCs for CVE-2026-4818
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-4818 (1)
Same Patch Batch · floragunn · 2026-03-31 · 3 CVEs total
| CVE-2026-4819 | 4.9 MEDIUM | Search Guard audit logs can contain under certain conditions user credentials |
| CVE-2026-4799 | 4.3 MEDIUM | Open redirect vulnerability in Search Guard Kibana Plugin via manipulated requests |
IV. Related Vulnerabilities
Same product: Search Guard FLX
-
CVE-2026-4819
Search Guard audit logs can contain under certain conditions -
CVE-2026-4799
Open redirect vulnerability in Search Guard Kibana Plugin vi -
CVE-2025-13653
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CVE-2025-12149
Unauthorized access to documents protected by Document-Level -
CVE-2025-12148
Unauthorized access to fields protected by Field Masking (FM
Same vendor: floragunn
-
CVE-2026-4819
Search Guard audit logs can contain under certain conditions -
CVE-2026-4799
Open redirect vulnerability in Search Guard Kibana Plugin vi -
CVE-2025-13653
Unauthorized access to documents in data streams with specia -
CVE-2025-12149
Unauthorized access to documents protected by Document-Level -
CVE-2025-12148
Unauthorized access to fields protected by Field Masking (FM
Same weakness: CWE-285
-
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HarnessRouter Identity Mode app.py improper authorization -
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V. Comments for CVE-2026-4818
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