CVE-2026-42398CWE-918ssrf

CVE-2026-42398

High · published May 29, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
34.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00412 · 34.3th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-05-29T01:16Z
Affected products (2)
ProductVersionsFixed in
elastic/kibana≥ 9.0.0, < 9.2.89.2.8
elastic/kibana≥ 9.3.0, < 9.3.29.3.2
References (1)
https://discuss.elastic.co/t/kibana-9-2-8-and-9-3-2-security-update-esa-2026-37/386557 · [email protected]
EPSS history
Timeline
  • 28 MAY 19:47Z
    Server-Side Request Forgery (SSRF) in Kibana Leading to Unauthorized Network Access
    cvelistv5