Vulnerability Details CVE-2026-93848
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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 21.5%
CVSS Severity
CVSS v3 Score 2.7
References