CVE-2026-42398

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.

CVSS 3.1

7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-25)

CWE

CWE-918

Published

2026-05-28

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• elastic:kibana

References

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

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