CVE-2026-9824
MEDIUM
NVD
CVSS Score
4.3
Severity
MEDIUM
Published
Jul 13, 2026
Vendor
unknown
Description
Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to check the manage_shared_channels permission in the /share-channel autocomplete handler, which allows an authenticated user without that permission to enumerate configured remote cluster connection metadata via slash command autocomplete.. Mattermost Advisory ID: MMSA-2026-00676