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CVE-2026-26939

MEDIUM CVSS 3.1: 6.5 EPSS 0.04%
Updated Mar 23, 2026
Elastic
Parameter Value
CVSS 6.5 (MEDIUM)
Affected Versions 8.0.0 — 9.2.6
Fixed In 8.19.12
Type CWE-862 (Missing Authorization)
Vendor Elastic
Public PoC No

Missing Authorization (CWE-862) in Kibana’s server-side Detection Rule Management can lead to Unauthorized Endpoint Response Action Configuration (host isolation, process termination, and process suspension) via CAPEC-1 (Accessing Functionality Not Properly Constrained by ACLs). This requires an authenticated attacker with rule management privileges.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 3

Configuration From (including) Up to (excluding)
Elastic Kibana
cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*
8.0.0 8.19.12
Elastic Kibana
cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*
9.0.0 9.2.6
Elastic Kibana
cpe:2.3:a:elastic:kibana:9.3.0:*:*:*:*:*:*:*