Is CVE-2026-93848 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-93848?

CVE-2026-93848 has a CVSS v3 severity of LOW (2.7).

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CVE-2026-93848

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