Vulnerability Report

CVE-2026-26939

Title: Missing Authorization in Kibana Detection Rule Management

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-26939.

CWE Category CWE-862

Published Date Mar 19, 2026

Modified Date Mar 23, 2026

Exploit Status Not Found

Score 6.5 CVSS v3.1

Exploit Probability (EPSS)

0.19%

Vulnerability Summary

CVE-2026-26939: 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.

Impacted Vendors

elastic 1

elasticsearch 1

Reference Links

https://discuss.elastic.co/t/kibana-8-19-12-9-2-6-9-3-1-security-update-esa-2026-19/385530

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

6.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-26939 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

March 23, 2026 MODIFIED

Vulnerability data updated via NVD.

March 23, 2026 MODIFIED

Vulnerability data updated via NVD.

March 20, 2026 MODIFIED

Vulnerability data updated via NVD.

March 19, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.