Security Advisory

CVE-2026-9597

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-13 08:17:36

Last updated 2026-07-13 13:55:15

Assigner Mattermost

CVSS score 5.4

State PUBLISHED

Description

Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4 fail to verify whether a guest account is deactivated before creating a session in the magic-link token login path, which allows a deactivated guest user to obtain a fully functional session via a magic-link token issued prior to deactivation.. Mattermost Advisory ID: MMSA-2026-00681

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