medium4.3
CVE-2026-24692
Mattermost fails to properly enforce read permissions in search API endpoints
Impact
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
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20260107142155-0481bd1fb045 | 8.0.0-20260107142155-0481bd1fb045 |
| go | github.com/mattermost/mattermost-server | < 5.3.2-0.20260107142155-0481bd1fb045 | 5.3.2-0.20260107142155-0481bd1fb045 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 10.11.0 before 10.11.11 from 11.2.0 before 11.2.3 from 11.3.0 before 11.3.1 |