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CVE-2026-4799— Open redirect vulnerability in Search Guard Kibana Plugin via manipulated requests

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 4.0.1及之前版本存在安全漏洞，该漏洞源于可能使用特制请求将用户重定向到不可信URL。

CVSS 4.3 · Medium EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-4799

Vulnerability Information
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Vulnerability Title
Open redirect vulnerability in Search Guard Kibana Plugin via manipulated requests
Source: CVE Program / CVE List V5
Vulnerability Description
In Search Guard FLX up to version 4.0.1, it is possible to use specially crafted requests to redirect the user to an untrusted URL.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
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 4.0.1及之前版本存在安全漏洞，该漏洞源于可能使用特制请求将用户重定向到不可信URL。
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-2026-4799

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III. Intelligence Information for CVE-2026-4799

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Vendor Advisories for CVE-2026-4799 (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-2026-4819 4.9 MEDIUM Search Guard audit logs can contain under certain conditions user credentials

IV. Related Vulnerabilities

Same product: Search Guard FLX
Same vendor: floragunn
Same weakness: CWE-601