Server-Side Request Forgery Vulnerability in Kibana by Elastic
CVE-2026-42398

7.7HIGH

Key Information:

Vendor

Elastic
Status
Kibana
Vendor
CVE Published:
28 May 2026

What is CVE-2026-42398?

A Server-Side Request Forgery vulnerability exists in Kibana that allows authenticated users with connector management privileges to circumvent the operator-configured connection allowlist. By creating a crafted Webhook connector, an attacker can manipulate Kibana into making outbound requests to blocked destinations, compromising the intended egress restrictions. This vulnerability can lead to unauthorized access and potential data exposure, highlighting the need for immediate attention from administrators to secure affected installations.

Affected Version(s)

Kibana 9.3.0 <= 9.3.1

Kibana 9.0.0 <= 9.2.7

References

https://discuss.elastic.co/t/kibana-9-2-8-and-9-3-2-secur...

CVSS V3.1

Score:
7.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.