CVE-2026-93846Low· 3.8▾ SunlitMattermost versions 11.7.x <= 11.7.10 fail to restrict which built-in roles can be assigned to a team member via the API, which allows a team admin to grant a team member permissions beyond those permitted by the configured permission sc…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 20.9 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Mattermost versions 11.7.x <= 11.7.10 fail to restrict which built-in roles can be assigned to a team member via the API, which allows a team admin to grant a team member permissions beyond those permitted by the configured permission scheme via the {{update-team-member-roles}} REST API.. Mattermost Advisory ID: MMSA-2026-00734
Mattermost >= 11.7.0 <= 11.7.10Update Mattermost to versions 11.11.0, 11.7.11 or higher.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-93847Low· 3.5Improper post type validation on scheduled post endpoints
CVE-2026-18551Medium· 6.5Mattermost guest account privilege escalation via member roles API
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CVE-2026-18256Medium· 4.3Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to properly restrict private teams from public team search results, which allows an authenticated user without permission to list private t…
CVE-2026-18223Medium· 5.0Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to validate the invited recipient's email address when redeeming team and guest invitation tokens, which allows an authenticated attacker t…
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