PT-2026-57806 · Mattermost · Mattermost
Adamsec-Dev
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Published
2026-07-13
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Updated
2026-07-13
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CVE-2026-9824
CVSS v3.1
4.3
Medium
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
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
Fix
Missing Authorization
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Weakness Enumeration
Related Identifiers
Affected Products
Mattermost