medium4.3
CVE-2026-2463
Mattermost fails to filter invite IDs based on user permissions
Impact
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to filter invite IDs based on user permissions, which allows regular users to bypass access control restrictions and register unauthorized accounts via leaked invite IDs during team creation. Mattermost Advisory ID: MMSA-2025-00565
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20260105134819-cc427af41b2a | 8.0.0-20260105134819-cc427af41b2a |
| go | github.com/mattermost/mattermost-server | < 5.3.2-0.20260105134819-cc427af41b2a | 5.3.2-0.20260105134819-cc427af41b2a |
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 |