CVE-2026-72673 Affecting kibana-8.18-advanced package, versions *

Note: Versions mentioned in the description apply only to the upstream kibana-8.18-advanced package and not the kibana-8.18-advanced package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

Incorrect Authorization (CWE-863) in Kibana can lead to unauthorized deletion of Synthetics private locations via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Synthetics private locations can be shared with more than one space, and deleting one removes it from every space it is shared with. The safeguard that prevented the deletion of a private location still in use evaluated only the monitors visible in the requesting user's own space, so monitors that depend on the private location in other spaces were not taken into account. As a result, an authenticated Kibana user holding the Synthetics write privilege in a single space could delete a private location that other spaces still depend on, even where the user has no access to those spaces. Deleting the private location removes the shared configuration and stops the monitors in the other spaces from running, which suppresses the availability monitoring those spaces rely on.

• https://www.cve.org/CVERecord?id=CVE-2026-72673
• https://github.com/advisories/GHSA-39jx-7xf9-qq62
• https://osv.dev/vulnerability/MINI-q56x-v2hf-j387
• https://osv.dev/vulnerability/CVE-2026-72673
• https://discuss.elastic.co/t/kibana-8-19-20-and-9-4-4-security-update-esa-2026-90/389518