CVE-2026-9824
Remote cluster metadata enumeration via /share-channel autocomplete
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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
| CWE | CWE-862 |
| Vendor | mattermost |
| Product | mattermost |
| Published | Jul 13, 2026 |
| Last Updated | Jul 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
Mattermost / Mattermost
11.7.0 ≤ 11.7.2 11.6.0 ≤ 11.6.4 10.11.0 ≤ 10.11.19
Credits
adamsec-dev