Security Advisory

CVE-2026-9693

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-17 22:07:12

Last updated 2026-08-18 14:21:04

Assigner Mattermost

CVSS score not scored

State PUBLISHED

Description

Mattermost versions 10.11.x <= 10.11.20, 11.7.x <= 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via the team threads API.. Mattermost Advisory ID: MMSA-2026-00682

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