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7.7

Kibana allows attackers to make unauthorized connections

CVE-2026-42398 · published 5 months ago
Summary

Kibana's Webhook connector can be tricked into making unauthorized connections to external websites. This can happen if an attacker is granted connector management privileges and configures a Webhook connector with a malicious target. To prevent this, administrators should closely monitor and control connector configurations and ensure that users with connector management privileges are trusted.

What to do
  • Update kibana to version 9.3.2.
  • Update elk to version 9.3.2.
Affected software
Ecosystem VendorProductAffected versions
Bitnami – kibana >= 9.3.0, < 9.3.2
Fix: upgrade to 9.3.2
Bitnami – elk >= 9.3.0, < 9.3.2
Fix: upgrade to 9.3.2
– elastic kibana >= 9.0.0, < 9.2.8
>= 9.3.0, < 9.3.2
cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*
Original advisory text
Server-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
7.7 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-918Server-Side Request Forgery (SSRF)
Timeline
Published28 May 2026
Updated4 Nov 2026
First seen28 May 2026
Sources
CVE-2026-42398 · NVD
BIT-elk-2026-42398 · OSV
CVE-2026-42398 · OSV
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