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Medium severity4.3OSV Advisory· Published Jul 13, 2026· Updated Jul 13, 2026

CVE-2026-9824

CVE-2026-9824

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

Affected products

3
  • Mattermost/Mattermost3 versions
    cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: >=10.11.0,<10.11.20
    • (no CPE)range: <=11.7.2, <=11.6.4, <=10.11.19
    • (no CPE)range: v10.11.19, v11.6.4, v10.11.19-rc1, …

Patches

Vulnerability mechanics

References

1

News mentions

0

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