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Known vulnerabilities in Mattermost Focalboard

Is your version affected?

CVE Summary Score Published
CVE-2026-28736 ** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to validate file ownership when serving uploaded files 4.3 Medium Apr 3, 2026
CVE-2026-25773 ** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to sanitize category IDs before incorporating them into… 8.1 High Apr 3, 2026

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