| Package | Affected versions | Patched versions |
|---|---|---|
| mattermost server | ≥ 11.7.0, < 11.7.11 | 11.7.11 |
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
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