| Package | Affected versions | Patched versions |
|---|---|---|
| mattermost server | ≥ 11.10.0, < 11.10.2≥ 11.7.0, < 11.7.11≥ 11.8.0, < 11.8.6≥ 11.9.0, < 11.9.2 | 11.10.211.7.1111.8.611.9.2 |
Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to sanitize the active channel field returned by the user status API endpoints, which allows an authenticated user to learn the channel ID of a private channel another user is actively viewing via the status endpoints, without being a member of that channel. Mattermost Advisory ID: MMSA-2026-00765
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free