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Vulnerability DatabaseCVE-2026-20796
CVE-2026-20796:
vulnerability analysis and mitigation
Mattermost versions 10.11.x <= 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /common_teams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549
Source: NVD
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