2.7
Low
CVE-2026-93848 Mattermost versions…
Description
Mattermost versions 11.7.x <= 11.7.10 fail to apply outbound internal-connection filtering to the OpenID discovery endpoint request which allows a System Administrator to determine whether internal addresses and ports are reachable from the server via an unauthenticated login request that triggers the discovery fetch.. Mattermost Advisory ID: MMSA-2026-00774
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Mattermost 11.11 | earliest → < 11.11.0 | 11.11.0 |
| Mattermost 11.7 | 11.7.0 → 11.7.10 | 11.7.11 |