CVE-2026-78606CWE-863broken-access-control

CVE-2026-78606

Medium · published September 2, 2026

CVSS v3.1
4.2
EPSS
0%
Percentile
13.4
In the wild
Unconfirmed
What it is

Incorrect Authorization (CWE-863) in Kibana can lead to unauthorized disclosure, modification, and deletion of data via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Where two authenticated principals originating from different authentication realms share the same username value, one could read, modify, and delete the other's private Elastic AI Assistant Knowledge Base entries.

The record
Technical detail
CVSS v3.1
4.2 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00233 · 13.4th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-09-02T00:17Z
Affected products (3)
ProductVersionsFixed in
elastic/kibana≥ 8.19.11, < 8.19.218.19.21
elastic/kibana≥ 9.3.0, < 9.4.69.4.6
elastic/kibana≥ 9.5.0, < 9.5.29.5.2
References (1)
https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-2-security-update-esa-2026-142/390093 · [email protected]
EPSS history
Timeline
  • 03 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 01 SEP 19:20Z
    Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data
    cvelistv5