Mattermost security advisory (AV26-828)
ID: e1217a13-e7fa-5202-984b-116ea8996b73
STIX ID: report--e1217a13-e7fa-5202-984b-116ea8996b73
Feed Name: Canadian Centre for Cyber Security Alerts and Advisories
Threat Score
As of 17 August 2026, Mattermost is reported vulnerable in versions prior to or equal to 10.11.21, 11.7.6, and 11.8.3; the advisory encourages users and administrators to review linked information and apply updates as they become available.
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