CVE-2026-42398

HIGH

Server-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access

Title source: cna

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.

References (1)

Core 1

Core References

https://discuss.elastic.co/t/kibana-9-2-8-and-9-3-2-security-update-esa-2026-37/386557

Scores

CVSS v3 7.7

EPSS 0.0027

EPSS Percentile 18.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-918

Status published

Products (3)

Elastic/Kibana 9.0.0 - 9.2.7

elastic/kibana 9.0.0 - 9.2.8

Elastic/Kibana 9.3.0 - 9.3.1

Published May 28, 2026

Tracked Since May 29, 2026