CVE-2026-24692
Medium
Description
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly enforce read permissions in search API endpoints which allows guest users without read permissions to access posts and files in channels via search API requests. Mattermost Advisory ID: MMSA-2025-00554
SeverityMedium
CVSS4.3
Exploit probability—
Product
Mattermost Server
PublishedMar 16, 2026
First seenMar 16, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- mattermost mattermost_server10.11.11, 11.2.3, 11.3.1 or later
- github.com/mattermost/mattermost/server/v88.0.0-20260107142155-0481bd1fb045 or later
- github.com/mattermost/mattermost-server5.3.2-0.20260107142155-0481bd1fb045, 10.11.11, 11.2.3, 11.3.1, 10.11.11+incompatible, 11.2.3+incompatible, 11.3.1+incompatible or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 10.11.0 ≤ v < 10.11.11, 11.2.0 ≤ v < 11.2.3, 11.3.0 ≤ v < 11.3.1 | 10.11.11, 11.2.3, 11.3.1 |
| github.com/mattermost/mattermost/server/v8Go | v < 8.0.0-20260107142155-0481bd1fb045 | 8.0.0-20260107142155-0481bd1fb045 |
| github.com/mattermost/mattermost-serverGo | v < 5.3.2-0.20260107142155-0481bd1fb045, 10.11.0-rc1 ≤ v < 10.11.11, 11.2.0-rc1 ≤ v < 11.2.3, 11.3.0-rc1 ≤ v < 11.3.1, 10.11.0-rc1+incompatible ≤ v < 10.11.11+incompatible, 11.2.0-rc1+incompatible ≤ v < 11.2.3+incompatible, 11.3.0-rc1+incompatible ≤ v < 11.3.1+incompatible | 5.3.2-0.20260107142155-0481bd1fb045, 10.11.11, 11.2.3, 11.3.1, 10.11.11+incompatible, 11.2.3+incompatible, 11.3.1+incompatible |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
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