Security Advisory

CVE-2026-16044

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-17 14:26:52

Last updated 2026-08-17 15:25:51

Assigner Mattermost

CVSS score 3.9

State PUBLISHED

Description

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to prevent guest users from receiving Board Admin privileges during board archive import which allows a board member to escalate a guest user to Board Admin via importing a crafted .boardarchive file. Mattermost Advisory ID: MMSA-2026-00672

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