CVE-2026-93847
Low
Description
Mattermost versions 11.7.x <= 11.7.10 fail to validate reserved system post types on the scheduled post creation and publication paths which allows an authenticated channel member to publish messages rendering as trusted system events via the scheduled post endpoint.. Mattermost Advisory ID: MMSA-2026-00732
SeverityLow
CVSS3.5
Exploit probability—
Product
Mattermost Server
PublishedOct 26, 2026
First seenOct 26, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- mattermost mattermost_server11.7.11 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 11.7.0 ≤ v < 11.7.11 | 11.7.11 |
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