CVE-2026-4819— Search Guard audit logs can contain under certain conditions user credentials
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 1.0.0至4.0.1版本存在安全漏洞，该漏洞源于审计日志功能可能记录登录Kibana用户的凭据。
Possible ATT&CK Techniques 1 AI
T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-4819
Vulnerability Information
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Vulnerability Title
Search Guard audit logs can contain under certain conditions user credentials
Source: CVE Program / CVE List V5
Vulnerability Description
In Search Guard FLX versions from 1.0.0 up to 4.0.1, the audit logging feature might log user credentials from users logging into Kibana.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过日志文件的信息暴露
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 1.0.0至4.0.1版本存在安全漏洞，该漏洞源于审计日志功能可能记录登录Kibana用户的凭据。
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 | 1.0.0 ~ 4.0.1 | - |
|
II. Public POCs for CVE-2026-4819
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-4819 (1)
Same Patch Batch · floragunn · 2026-03-31 · 3 CVEs total
| CVE-2026-4818 | 6.8 MEDIUM | Some management operations on data streams are not properly restricted when user does not |
| 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-2026-4818
Some management operations on data streams are not properly -
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 vendor: floragunn
-
CVE-2026-4818
Some management operations on data streams are not properly -
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-532
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KNIME Analytics Platform logs credentials of configured prox -
CVE-2026-115358
OpenBao before 2.6.3 Sensitive Data Leak in Audit Log via Ma
V. Comments for CVE-2026-4819
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