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CVE-2026-42398— Server-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access

Quick assessment

Affected
Elastic Kibana
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 Kibana是Elastic公司的一个可用数据可视化仪表板软件。 Elastic Kibana存在安全漏洞，该漏洞源于服务端请求伪造，允许具有连接器管理权限的认证用户绕过操作员配置的连接白名单，通过配置特制的Webhook连接器发起出站请求。

CVSS 7.7 · High EPSS 0.41% · P33

Affected Version Matrix 2

VendorProduct Version RangeStatus
Elastic Kibana 9.3.0≤ 9.3.1 affected
9.0.0≤ 9.2.7 affected
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I. Basic Information for CVE-2026-42398

Vulnerability Information
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Vulnerability Title
Server-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access
Source: CVE Program / CVE List V5
Vulnerability Description
Server-Side Request Forgery (CWE-918) in Kibana allows authenticated users with connector management privileges to bypass the operator-configured connection allowlist. By configuring a Webhook connector with a crafted target, an attacker can cause Kibana to issue outbound requests to destinations that the egress restriction controls were intended to block.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Kibana 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic Kibana是Elastic公司的一个可用数据可视化仪表板软件。 Elastic Kibana存在安全漏洞，该漏洞源于服务端请求伪造，允许具有连接器管理权限的认证用户绕过操作员配置的连接白名单，通过配置特制的Webhook连接器发起出站请求。
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 Kibana 9.3.0 ~ 9.3.1 -

II. Public POCs for CVE-2026-42398

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III. Intelligence Information for CVE-2026-42398

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Vendor Advisories for CVE-2026-42398 (1)

Same Patch Batch · Elastic · 2026-05-28 · 10 CVEs total

CVE-2026-49095 7.2 HIGH Improper Input Validation in Kibana Fleet Leading to Privilege Escalation
CVE-2026-33464 6.5 MEDIUM Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
CVE-2026-42399 6.5 MEDIUM Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
CVE-2026-42400 6.5 MEDIUM Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
CVE-2026-49094 6.5 MEDIUM Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
CVE-2026-49093 6.3 MEDIUM Server-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access
CVE-2026-33463 5.3 MEDIUM Operation on a Resource after Expiration or Termination in Kibana Leading to Unauthorized
CVE-2026-33462 4.6 MEDIUM Path Traversal in Kibana Leading to Unauthorized Deletion of User Accounts
CVE-2026-42401 4.1 MEDIUM Improper Neutralization of Input During Web Page Generation in Kibana Leading to Stored HT

IV. Related Vulnerabilities

Same product: Kibana
Same vendor: Elastic
Same weakness: CWE-918

V. Comments for CVE-2026-42398

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